add recipes, timelines, group scheduling

plant-manager-web/src/App.tsx

@@ -4,7 +4,9 @@ import {
   createCareActivity,
   createCareAction,
   createPlant,
+  createPlantGroup,
   createPlantLocation,
+  createRecipe,
   assignPlantFlag,
   completeCareTasksBulk,
   createPlantFlag,
@@ -13,17 +15,21 @@ import {
   deleteCareActivity,
   deleteCareAction,
   deletePlant,
+  deletePlantGroup,
   deletePlantFlag,
   deletePlantLocation,
   deletePlantTaxon,
+  deleteRecipe,
   getActionResources,
   getCareActivities,
   getCareActions,
   getCareTasks,
   getPlants,
   getPlantFlags,
+  getPlantGroups,
   getPlantLocations,
   getPlantTaxa,
+  getRecipes,
   removePlantFlagAssignment,
   removePlantCareSchedulesBulk,
   resolvePlantFlag,
@@ -32,21 +38,25 @@ import {
   updateCareActivity,
   updateCareAction,
   updatePlant,
+  updatePlantGroup,
   updatePlantFlag,
   updatePlantLocation,
   updatePlantTaxon,
+  updateRecipe,
 } from './api';
 import { ActionsView } from './components/ActionsView';
 import { ActivitiesView } from './components/ActivitiesView';
 import { FlagsView } from './components/FlagsView';
+import { GroupsView } from './components/GroupsView';
 import { HomeView } from './components/HomeView';
 import { LocationsView } from './components/LocationsView';
 import { PlantManagementView } from './components/PlantManagementView';
 import { PlantsView } from './components/PlantsView';
+import { RecipesView } from './components/RecipesView';
 import { ResourcesView } from './components/ResourcesView';
 import { SchedulesView } from './components/SchedulesView';
 import { TaxaView } from './components/TaxaView';
-import type { ActionResource, CareActivity, CareAction, CareTask, Plant, PlantFlag, PlantFlagDefinition, PlantLocation, PlantTaxon } from './domain';
+import type { ActionResource, CareActivity, CareAction, CareTask, Plant, PlantFlag, PlantFlagDefinition, PlantGroup, PlantLocation, PlantTaxon, Recipe } from './domain';
 import {
   emptyActionForm,
   emptyActivityForm,
@@ -54,7 +64,9 @@ import {
   emptyFlagDefinitionForm,
   emptyLocationForm,
   emptyPlantForm,
+  emptyPlantGroupForm,
   emptyPlantFlagForm,
+  emptyRecipeForm,
   emptyResourceForm,
   emptyTaxonForm,
   toActionForm,
@@ -66,9 +78,13 @@ import {
   toFlagDefinitionPayload,
   toLocationForm,
   toLocationPayload,
+  toPlantGroupForm,
+  toPlantGroupPayload,
   toPlantFlagPayload,
   toPlantForm,
   toPlantPayload,
+  toRecipeForm,
+  toRecipePayload,
   toResourceForm,
   toResourcePayload,
   toTaxonForm,
@@ -78,8 +94,10 @@ import {
   type BulkScheduleFormState,
   type FlagDefinitionFormState,
   type LocationFormState,
+  type PlantGroupFormState,
   type PlantFlagFormState,
   type PlantFormState,
+  type RecipeFormState,
   type ResourceFormState,
   type TaxonFormState,
   type View,
@@ -90,8 +108,10 @@ export function App() {
   const [plants, setPlants] = useState<Plant[]>([]);
   const [plantTaxa, setPlantTaxa] = useState<PlantTaxon[]>([]);
   const [plantLocations, setPlantLocations] = useState<PlantLocation[]>([]);
+  const [plantGroups, setPlantGroups] = useState<PlantGroup[]>([]);
   const [careActions, setCareActions] = useState<CareAction[]>([]);
   const [actionResources, setActionResources] = useState<ActionResource[]>([]);
+  const [recipes, setRecipes] = useState<Recipe[]>([]);
   const [careActivities, setCareActivities] = useState<CareActivity[]>([]);
   const [plantFlagDefinitions, setPlantFlagDefinitions] = useState<PlantFlagDefinition[]>([]);
   const [careTasks, setCareTasks] = useState<CareTask[]>([]);
@@ -100,15 +120,19 @@ export function App() {
   const [editingPlantId, setEditingPlantId] = useState<number | null>(null);
   const [editingTaxonId, setEditingTaxonId] = useState<number | null>(null);
   const [editingLocationId, setEditingLocationId] = useState<number | null>(null);
+  const [editingPlantGroupId, setEditingPlantGroupId] = useState<number | null>(null);
   const [editingActionId, setEditingActionId] = useState<number | null>(null);
   const [editingResourceId, setEditingResourceId] = useState<number | null>(null);
+  const [editingRecipeId, setEditingRecipeId] = useState<number | null>(null);
   const [editingActivityId, setEditingActivityId] = useState<number | null>(null);
   const [editingFlagDefinitionId, setEditingFlagDefinitionId] = useState<number | null>(null);
   const [isPlantEditorOpen, setIsPlantEditorOpen] = useState(false);
   const [isTaxonEditorOpen, setIsTaxonEditorOpen] = useState(false);
   const [isLocationEditorOpen, setIsLocationEditorOpen] = useState(false);
+  const [isPlantGroupEditorOpen, setIsPlantGroupEditorOpen] = useState(false);
   const [isActionEditorOpen, setIsActionEditorOpen] = useState(false);
   const [isResourceEditorOpen, setIsResourceEditorOpen] = useState(false);
+  const [isRecipeEditorOpen, setIsRecipeEditorOpen] = useState(false);
   const [isActivityEditorOpen, setIsActivityEditorOpen] = useState(false);
   const [isFlagDefinitionEditorOpen, setIsFlagDefinitionEditorOpen] = useState(false);
   const [selectedPlantId, setSelectedPlantId] = useState<number | null>(null);
@@ -116,13 +140,16 @@ export function App() {
   const [selectedLocationId, setSelectedLocationId] = useState<number | null>(null);
   const [selectedActionId, setSelectedActionId] = useState<number | null>(null);
   const [selectedResourceId, setSelectedResourceId] = useState<number | null>(null);
+  const [selectedRecipeId, setSelectedRecipeId] = useState<number | null>(null);
   const [selectedActivityId, setSelectedActivityId] = useState<number | null>(null);
   const [selectedFlagDefinitionId, setSelectedFlagDefinitionId] = useState<number | null>(null);
   const [form, setForm] = useState<PlantFormState>(emptyPlantForm);
   const [taxonForm, setTaxonForm] = useState<TaxonFormState>(emptyTaxonForm);
   const [locationForm, setLocationForm] = useState<LocationFormState>(emptyLocationForm);
+  const [plantGroupForm, setPlantGroupForm] = useState<PlantGroupFormState>(emptyPlantGroupForm);
   const [actionForm, setActionForm] = useState<ActionFormState>(emptyActionForm);
   const [resourceForm, setResourceForm] = useState<ResourceFormState>(emptyResourceForm);
+  const [recipeForm, setRecipeForm] = useState<RecipeFormState>(emptyRecipeForm);
   const [activityForm, setActivityForm] = useState<ActivityFormState>(emptyActivityForm);
   const [flagDefinitionForm, setFlagDefinitionForm] = useState<FlagDefinitionFormState>(emptyFlagDefinitionForm);
   const [plantFlagForm, setPlantFlagForm] = useState<PlantFlagFormState>(emptyPlantFlagForm);
@@ -136,8 +163,10 @@ export function App() {
         tasksResponse,
         taxaResponse,
         locationsResponse,
+        groupsResponse,
         actionsResponse,
         resourcesResponse,
+        recipesResponse,
         activitiesResponse,
         flagsResponse,
       ] = await Promise.all([
@@ -145,8 +174,10 @@ export function App() {
         getCareTasks(),
         getPlantTaxa(),
         getPlantLocations(),
+        getPlantGroups(),
         getCareActions(),
         getActionResources(),
+        getRecipes(),
         getCareActivities(),
         getPlantFlags(),
       ]);
@@ -156,8 +187,10 @@ export function App() {
       setCareTasks(tasksResponse);
       setPlantTaxa(taxaResponse);
       setPlantLocations(locationsResponse);
+      setPlantGroups(groupsResponse);
       setCareActions(actionsResponse);
       setActionResources(resourcesResponse);
+      setRecipes(recipesResponse);
       setCareActivities(activitiesResponse);
       setPlantFlagDefinitions(flagsResponse);
     } catch {
@@ -174,6 +207,17 @@ export function App() {
     setPlantLocations(locationsResponse);
   }
 
+  async function loadGroupsAndPlants() {
+    const [groupsResponse, plantsResponse] = await Promise.all([
+      getPlantGroups(),
+      getPlants(),
+    ]);
+
+    setError(null);
+    setPlantGroups(groupsResponse);
+    setPlants(plantsResponse);
+  }
+
   async function loadPlants() {
     const plantsResponse = await getPlants();
 
@@ -220,12 +264,14 @@ export function App() {
       tasksResponse,
       actionsResponse,
       resourcesResponse,
+      recipesResponse,
       activitiesResponse,
     ] = await Promise.all([
       getPlants(),
       getCareTasks(),
       getCareActions(),
       getActionResources(),
+      getRecipes(),
       getCareActivities(),
     ]);
 
@@ -234,9 +280,21 @@ export function App() {
     setCareTasks(tasksResponse);
     setCareActions(actionsResponse);
     setActionResources(resourcesResponse);
+    setRecipes(recipesResponse);
     setCareActivities(activitiesResponse);
   }
 
+  async function loadRecipesAndResources() {
+    const [recipesResponse, resourcesResponse] = await Promise.all([
+      getRecipes(),
+      getActionResources(),
+    ]);
+
+    setError(null);
+    setRecipes(recipesResponse);
+    setActionResources(resourcesResponse);
+  }
+
   useEffect(() => {
     queueMicrotask(() => {
       void loadDashboard();
@@ -254,10 +312,13 @@ export function App() {
   const selectedTaxon = plantTaxa.find((taxon) => taxon.id === selectedTaxonId);
   const activeLocation = plantLocations.find((location) => location.id === editingLocationId);
   const selectedLocation = plantLocations.find((location) => location.id === selectedLocationId);
+  const activePlantGroup = plantGroups.find((group) => group.id === editingPlantGroupId);
   const activeAction = careActions.find((action) => action.id === editingActionId);
   const selectedAction = careActions.find((action) => action.id === selectedActionId);
   const activeResource = actionResources.find((resource) => resource.id === editingResourceId);
   const selectedResource = actionResources.find((resource) => resource.id === selectedResourceId);
+  const activeRecipe = recipes.find((recipe) => recipe.id === editingRecipeId);
+  const selectedRecipe = recipes.find((recipe) => recipe.id === selectedRecipeId);
   const activeActivity = careActivities.find((activity) => activity.id === editingActivityId);
   const selectedActivity = careActivities.find((activity) => activity.id === selectedActivityId);
   const activeFlagDefinition = plantFlagDefinitions.find((flag) => flag.id === editingFlagDefinitionId);
@@ -275,6 +336,10 @@ export function App() {
     setLocationForm((current) => ({ ...current, [field]: value }));
   }
 
+  function updatePlantGroupForm(field: keyof PlantGroupFormState, value: string | string[]) {
+    setPlantGroupForm((current) => ({ ...current, [field]: value }));
+  }
+
   function updateActionForm(field: keyof ActionFormState, value: string) {
     setActionForm((current) => ({ ...current, [field]: value }));
   }
@@ -287,6 +352,10 @@ export function App() {
     setActivityForm((current) => ({ ...current, [field]: value }));
   }
 
+  function updateRecipeForm(field: keyof RecipeFormState, value: RecipeFormState[keyof RecipeFormState]) {
+    setRecipeForm((current) => ({ ...current, [field]: value }));
+  }
+
   function updateFlagDefinitionForm(field: keyof FlagDefinitionFormState, value: string) {
     setFlagDefinitionForm((current) => ({ ...current, [field]: value }));
   }
@@ -304,6 +373,7 @@ export function App() {
 
   function startAddingPlant() {
     setEditingPlantId(null);
+    setSelectedPlantId(null);
     setForm(emptyPlantForm);
     setIsPlantEditorOpen(true);
     setView('plants');
@@ -331,6 +401,14 @@ export function App() {
     setIsPlantEditorOpen(false);
   }
 
+  function openPlantReadOnlyDetail(plant: Plant) {
+    setSelectedPlantId(plant.id);
+    setEditingPlantId(null);
+    setForm(emptyPlantForm);
+    setIsPlantEditorOpen(false);
+    setView('plants');
+  }
+
   function startAddingTaxon() {
     setEditingTaxonId(null);
     setSelectedTaxonId(null);
@@ -375,6 +453,26 @@ export function App() {
     setIsLocationEditorOpen(false);
   }
 
+  function startAddingPlantGroup() {
+    setEditingPlantGroupId(null);
+    setPlantGroupForm(emptyPlantGroupForm);
+    setIsPlantGroupEditorOpen(true);
+    setView('groups');
+  }
+
+  function startEditingPlantGroup(group: PlantGroup) {
+    setEditingPlantGroupId(group.id);
+    setPlantGroupForm(toPlantGroupForm(group));
+    setIsPlantGroupEditorOpen(true);
+    setView('groups');
+  }
+
+  function cancelEditingPlantGroup() {
+    setEditingPlantGroupId(null);
+    setPlantGroupForm(emptyPlantGroupForm);
+    setIsPlantGroupEditorOpen(false);
+  }
+
   function startAddingAction() {
     setEditingActionId(null);
     setSelectedActionId(null);
@@ -419,6 +517,28 @@ export function App() {
     setIsResourceEditorOpen(false);
   }
 
+  function startAddingRecipe() {
+    setEditingRecipeId(null);
+    setSelectedRecipeId(null);
+    setRecipeForm(emptyRecipeForm);
+    setIsRecipeEditorOpen(true);
+    setView('recipes');
+  }
+
+  function startEditingRecipe(recipe: Recipe) {
+    setSelectedRecipeId(null);
+    setEditingRecipeId(recipe.id);
+    setRecipeForm(toRecipeForm(recipe));
+    setIsRecipeEditorOpen(true);
+    setView('recipes');
+  }
+
+  function cancelEditingRecipe() {
+    setEditingRecipeId(null);
+    setRecipeForm(emptyRecipeForm);
+    setIsRecipeEditorOpen(false);
+  }
+
   function startAddingActivity() {
     setEditingActivityId(null);
     setSelectedActivityId(null);
@@ -504,6 +624,7 @@ export function App() {
     try {
       await updatePlant(selectedPlant.id, {
         nickname: selectedPlant.nickname,
+        birthday: selectedPlant.birthday,
         taxonId: nextValues.taxonId === undefined ? selectedPlant.taxonId : nextValues.taxonId,
         locationId: nextValues.locationId === undefined ? selectedPlant.locationId : nextValues.locationId,
         careSchedules: null,
@@ -639,6 +760,49 @@ export function App() {
     }
   }
 
+  async function savePlantGroup() {
+    if (!plantGroupForm.name.trim()) {
+      setError('Group name is required.');
+      return;
+    }
+
+    setIsSaving(true);
+    try {
+      const payload = toPlantGroupPayload(plantGroupForm);
+      if (editingPlantGroupId === null) {
+        await createPlantGroup(payload);
+      } else {
+        await updatePlantGroup(editingPlantGroupId, payload);
+      }
+      cancelEditingPlantGroup();
+      await loadGroupsAndPlants();
+    } catch {
+      setError('Could not save the plant group.');
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
+  async function removePlantGroup(group: PlantGroup) {
+    const confirmed = window.confirm(`Delete ${group.name}?`);
+    if (!confirmed) {
+      return;
+    }
+
+    setIsSaving(true);
+    try {
+      await deletePlantGroup(group.id);
+      if (editingPlantGroupId === group.id) {
+        cancelEditingPlantGroup();
+      }
+      await loadGroupsAndPlants();
+    } catch {
+      setError('Could not delete the plant group.');
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
   async function saveAction() {
     if (!actionForm.name.trim()) {
       setError('Action name is required.');
@@ -699,6 +863,7 @@ export function App() {
       }
       cancelEditingResource();
       await loadCareModel();
+      await loadRecipesAndResources();
     } catch {
       setError('Could not save the resource.');
     } finally {
@@ -719,6 +884,7 @@ export function App() {
         cancelEditingResource();
       }
       await loadCareModel();
+      await loadRecipesAndResources();
     } catch {
       setError('Could not delete the resource.');
     } finally {
@@ -726,6 +892,52 @@ export function App() {
     }
   }
 
+  async function saveRecipe() {
+    if (!recipeForm.name.trim() || !recipeForm.type.trim() || !recipeForm.outputResourceName.trim() || recipeForm.components.length === 0) {
+      setError('Recipe name, type, produced resource, and at least one component are required.');
+      return;
+    }
+
+    setIsSaving(true);
+    try {
+      const payload = toRecipePayload(recipeForm);
+      if (editingRecipeId === null) {
+        await createRecipe(payload);
+      } else {
+        await updateRecipe(editingRecipeId, payload);
+      }
+      cancelEditingRecipe();
+      await loadRecipesAndResources();
+    } catch {
+      setError('Could not save the recipe.');
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
+  async function removeRecipe(recipe: Recipe) {
+    const confirmed = window.confirm(`Delete ${recipe.name}?`);
+    if (!confirmed) {
+      return;
+    }
+
+    setIsSaving(true);
+    try {
+      await deleteRecipe(recipe.id);
+      if (selectedRecipeId === recipe.id) {
+        setSelectedRecipeId(null);
+      }
+      if (editingRecipeId === recipe.id) {
+        cancelEditingRecipe();
+      }
+      await loadRecipesAndResources();
+    } catch {
+      setError('Could not delete the recipe.');
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
   async function saveActivity() {
     if (!activityForm.name.trim() || activityForm.actions.length === 0) {
       setError('Activity name and at least one action are required.');
@@ -1010,13 +1222,6 @@ export function App() {
               >
                 Care Activities
               </button>
-              <button
-                type="button"
-                aria-current={view === 'actions' ? 'page' : undefined}
-                onClick={() => setView('actions')}
-              >
-                Care Actions
-              </button>
             </div>
 
             <div className="nav-group">
@@ -1035,6 +1240,13 @@ export function App() {
               >
                 Locations
               </button>
+              <button
+                type="button"
+                aria-current={view === 'groups' ? 'page' : undefined}
+                onClick={() => setView('groups')}
+              >
+                Groups
+              </button>
               <button
                 type="button"
                 aria-current={view === 'resources' ? 'page' : undefined}
@@ -1042,6 +1254,20 @@ export function App() {
               >
                 Resources
               </button>
+              <button
+                type="button"
+                aria-current={view === 'recipes' ? 'page' : undefined}
+                onClick={() => setView('recipes')}
+              >
+                Recipes
+              </button>
+              <button
+                type="button"
+                aria-current={view === 'actions' ? 'page' : undefined}
+                onClick={() => setView('actions')}
+              >
+                Actions
+              </button>
               <button
                 type="button"
                 aria-current={view === 'flags' ? 'page' : undefined}
@@ -1056,9 +1282,11 @@ export function App() {
             <h3>Catalog Status</h3>
             <p>{dueCount} due</p>
             <p>{plantLocations.length} locations</p>
+            <p>{plantGroups.length} groups</p>
             <p>{careActivities.length} activities</p>
             <p>{careActions.length} actions</p>
             <p>{actionResources.length} resources</p>
+            <p>{recipes.length} recipes</p>
             <p>{plantFlagDefinitions.length} flags</p>
           </section>
         </aside>
@@ -1079,11 +1307,14 @@ export function App() {
                 isPlantEditorOpen={isPlantEditorOpen}
                 isSaving={isSaving}
                 plants={plants}
+                selectedPlant={selectedPlant}
                 onCancel={cancelEditing}
+                onCloseDetail={() => setSelectedPlantId(null)}
                 onDelete={(plant) => void removePlant(plant)}
                 onEdit={startEditingPlant}
                 onFieldChange={updateForm}
                 onNew={startAddingPlant}
+                onOpenDetail={openPlantReadOnlyDetail}
                 onSave={() => void savePlant()}
               />
             ) : view === 'plant-management' ? (
@@ -1111,6 +1342,7 @@ export function App() {
                 activities={careActivities}
                 error={error}
                 form={bulkScheduleForm}
+                groups={plantGroups}
                 isLoading={isLoading}
                 isSaving={isSaving}
                 plants={plants}
@@ -1156,6 +1388,23 @@ export function App() {
                 onOpenDetail={(location) => setSelectedLocationId(location.id)}
                 onSave={() => void saveLocation()}
               />
+            ) : view === 'groups' ? (
+              <GroupsView
+                activeGroupName={activePlantGroup?.name}
+                error={error}
+                form={plantGroupForm}
+                groups={plantGroups}
+                isEditorOpen={isPlantGroupEditorOpen}
+                isLoading={isLoading}
+                isSaving={isSaving}
+                plants={plants}
+                onCancel={cancelEditingPlantGroup}
+                onDelete={(group) => void removePlantGroup(group)}
+                onEdit={startEditingPlantGroup}
+                onFieldChange={updatePlantGroupForm}
+                onNew={startAddingPlantGroup}
+                onSave={() => void savePlantGroup()}
+              />
             ) : view === 'actions' ? (
               <ActionsView
                 activeActionName={activeAction?.name}
@@ -1215,6 +1464,26 @@ export function App() {
                 onSave={() => void saveResource()}
                 resources={actionResources}
               />
+            ) : view === 'recipes' ? (
+              <RecipesView
+                activeRecipeName={activeRecipe?.name}
+                error={error}
+                form={recipeForm}
+                isEditorOpen={isRecipeEditorOpen}
+                isLoading={isLoading}
+                isSaving={isSaving}
+                recipes={recipes}
+                resources={actionResources}
+                selectedRecipe={selectedRecipe}
+                onCancel={cancelEditingRecipe}
+                onCloseDetail={() => setSelectedRecipeId(null)}
+                onDelete={(recipe) => void removeRecipe(recipe)}
+                onEdit={startEditingRecipe}
+                onFieldChange={updateRecipeForm}
+                onNew={startAddingRecipe}
+                onOpenDetail={(recipe) => setSelectedRecipeId(recipe.id)}
+                onSave={() => void saveRecipe()}
+              />
             ) : view === 'flags' ? (
               <FlagsView
                 activeFlagName={activeFlagDefinition?.name}
@@ -1239,6 +1508,7 @@ export function App() {
                 careTasks={careTasks}
                 dueCount={dueCount}
                 error={error}
+                groups={plantGroups}
                 isLoading={isLoading}
                 plants={plants}
                 onCompleteBulkTasks={(tasks) => void completeBulkTasks(tasks)}
@@ -1265,10 +1535,12 @@ function getViewEyebrow(view: View) {
       return 'Care';
     case 'taxa':
     case 'locations':
+    case 'groups':
     case 'resources':
+    case 'recipes':
+    case 'actions':
     case 'flags':
       return 'Catalogs';
-    case 'actions':
     case 'activities':
       return 'Care';
     default:
@@ -1288,12 +1560,16 @@ function getViewTitle(view: View) {
       return 'Plant Taxa';
     case 'locations':
       return 'Locations';
+    case 'groups':
+      return 'Groups';
     case 'actions':
-      return 'Care Actions';
+      return 'Actions';
     case 'activities':
       return 'Care Activities';
     case 'resources':
       return 'Resources';
+    case 'recipes':
+      return 'Recipes';
     case 'flags':
       return 'Plant Flags';
     default:

plant-manager-web/src/api.ts

@@ -8,12 +8,16 @@ import type {
   BulkCompleteCareTasksPayload,
   CareTask,
   BulkPlantCareSchedulePayload,
+  Recipe,
+  RecipePayload,
   Plant,
   AssignPlantFlagPayload,
   PlantPayload,
   PlantFlag,
   PlantFlagDefinition,
   PlantFlagDefinitionPayload,
+  PlantGroup,
+  PlantGroupPayload,
   PlantLocation,
   PlantLocationPayload,
   PlantTaxon,
@@ -74,6 +78,30 @@ export async function deletePlantLocation(id: number) {
   });
 }
 
+export async function getPlantGroups() {
+  return request<PlantGroup[]>('/api/plant-groups');
+}
+
+export async function createPlantGroup(payload: PlantGroupPayload) {
+  return request<PlantGroup>('/api/plant-groups', {
+    method: 'POST',
+    body: JSON.stringify(payload),
+  });
+}
+
+export async function updatePlantGroup(id: number, payload: PlantGroupPayload) {
+  return request<PlantGroup>(`/api/plant-groups/${id}`, {
+    method: 'PUT',
+    body: JSON.stringify(payload),
+  });
+}
+
+export async function deletePlantGroup(id: number) {
+  return request<void>(`/api/plant-groups/${id}`, {
+    method: 'DELETE',
+  });
+}
+
 export async function createPlantTaxon(payload: PlantTaxonPayload) {
   return request<PlantTaxon>('/api/plant-taxa', {
     method: 'POST',
@@ -142,6 +170,30 @@ export async function deleteActionResource(id: number) {
   });
 }
 
+export async function getRecipes() {
+  return request<Recipe[]>('/api/recipes');
+}
+
+export async function createRecipe(payload: RecipePayload) {
+  return request<Recipe>('/api/recipes', {
+    method: 'POST',
+    body: JSON.stringify(payload),
+  });
+}
+
+export async function updateRecipe(id: number, payload: RecipePayload) {
+  return request<Recipe>(`/api/recipes/${id}`, {
+    method: 'PUT',
+    body: JSON.stringify(payload),
+  });
+}
+
+export async function deleteRecipe(id: number) {
+  return request<void>(`/api/recipes/${id}`, {
+    method: 'DELETE',
+  });
+}
+
 export async function getCareActivities() {
   return request<CareActivity[]>('/api/care-activities');
 }

plant-manager-web/src/components/GroupsView.tsx

@@ -0,0 +1,159 @@
+import { Edit3, Plus, Save, Trash2, X } from 'lucide-react';
+import type { Plant, PlantGroup } from '../domain';
+import type { PlantGroupFormState } from '../form-state';
+
+type GroupsViewProps = {
+  activeGroupName?: string;
+  error: string | null;
+  form: PlantGroupFormState;
+  groups: PlantGroup[];
+  isEditorOpen: boolean;
+  isLoading: boolean;
+  isSaving: boolean;
+  plants: Plant[];
+  onCancel: () => void;
+  onDelete: (group: PlantGroup) => void;
+  onEdit: (group: PlantGroup) => void;
+  onFieldChange: (field: keyof PlantGroupFormState, value: string | string[]) => void;
+  onNew: () => void;
+  onSave: () => void;
+};
+
+export function GroupsView({
+  activeGroupName,
+  error,
+  form,
+  groups,
+  isEditorOpen,
+  isLoading,
+  isSaving,
+  plants,
+  onCancel,
+  onDelete,
+  onEdit,
+  onFieldChange,
+  onNew,
+  onSave,
+}: GroupsViewProps) {
+  const selectedPlantIds = new Set(form.plantIds);
+
+  return (
+    <>
+      <section className="summary-panel" aria-labelledby="groups-summary-heading">
+        <div>
+          <p className="eyebrow">Plant groups</p>
+          <h2 id="groups-summary-heading">
+            {isLoading ? 'Loading groups' : `${groups.length} groups`}
+          </h2>
+          <p>{error ?? 'Organize plants for scheduling and care logging.'}</p>
+        </div>
+        <button className="primary-action" type="button" onClick={onNew}>
+          <Plus size={18} />
+          New group
+        </button>
+      </section>
+
+      {isEditorOpen ? (
+        <section className="editor-panel" aria-labelledby="group-editor-heading">
+          <div className="section-heading">
+            <div>
+              <p className="eyebrow">{activeGroupName ? 'Editing' : 'New group'}</p>
+              <h2 id="group-editor-heading">{activeGroupName ?? 'Group details'}</h2>
+            </div>
+            <button className="icon-button compact" type="button" aria-label="Clear form" onClick={onCancel}>
+              <X size={18} />
+            </button>
+          </div>
+
+          <div className="plant-form">
+            <label>
+              Name
+              <input
+                disabled={isSaving}
+                value={form.name}
+                onChange={(event) => onFieldChange('name', event.target.value)}
+              />
+            </label>
+            <label className="form-wide">
+              Notes
+              <textarea
+                disabled={isSaving}
+                value={form.notes}
+                onChange={(event) => onFieldChange('notes', event.target.value)}
+              />
+            </label>
+          </div>
+
+          <fieldset className="resource-picker schedule-picker">
+            <legend>Plants</legend>
+            <div className="plant-list compact-plant-list">
+              {!isLoading && plants.length === 0 ? (
+                <p className="empty-state">No plants available.</p>
+              ) : null}
+
+              {plants.map((plant) => (
+                <label className="plant-row check-row" key={plant.id}>
+                  <span>
+                    <input
+                      checked={selectedPlantIds.has(String(plant.id))}
+                      disabled={isSaving}
+                      type="checkbox"
+                      onChange={(event) => {
+                        const plantId = String(plant.id);
+                        const nextPlantIds = event.target.checked
+                          ? [...form.plantIds, plantId]
+                          : form.plantIds.filter((id) => id !== plantId);
+                        onFieldChange('plantIds', nextPlantIds);
+                      }}
+                    />
+                    <strong>{plant.nickname}</strong>
+                    <small>{plant.taxon} - {plant.location}</small>
+                  </span>
+                </label>
+              ))}
+            </div>
+          </fieldset>
+
+          <div className="form-actions">
+            <button className="primary-action" type="button" disabled={isSaving || !form.name.trim()} onClick={onSave}>
+              <Save size={18} />
+              {isSaving ? 'Saving' : 'Save group'}
+            </button>
+            <button className="text-button" type="button" onClick={onCancel}>
+              Cancel
+            </button>
+          </div>
+        </section>
+      ) : null}
+
+      <section className="section" aria-labelledby="groups-list-heading">
+        <div className="section-heading">
+          <h2 id="groups-list-heading">All Groups</h2>
+        </div>
+
+        <div className="plant-list">
+          {!isLoading && groups.length === 0 ? (
+            <p className="empty-state">No groups yet.</p>
+          ) : null}
+
+          {groups.map((group) => (
+            <article className="plant-row" key={group.id}>
+              <div>
+                <h3>{group.name}</h3>
+                <p>{group.plants.length} plants{group.notes ? ` - ${group.notes}` : ''}</p>
+              </div>
+              <div className="row-actions">
+                <button className="icon-button compact" type="button" aria-label={`Edit ${group.name}`} onClick={() => onEdit(group)}>
+                  <Edit3 size={17} />
+                </button>
+                <button className="icon-button compact danger" type="button" aria-label={`Delete ${group.name}`} onClick={() => onDelete(group)}>
+                  <Trash2 size={17} />
+                </button>
+              </div>
+            </article>
+          ))}
+        </div>
+      </section>
+    </>
+  );
+}

plant-manager-web/src/components/HomeView.tsx

@@ -1,12 +1,13 @@
 import { useMemo, useState } from 'react';
 import { CalendarCheck, Plus } from 'lucide-react';
-import type { CareTask, Plant } from '../domain';
+import type { CareTask, Plant, PlantGroup } from '../domain';
 import { PlantCard } from './PlantCard';
 
 type HomeViewProps = {
   careTasks: CareTask[];
   dueCount: number;
   error: string | null;
+  groups: PlantGroup[];
   isLoading: boolean;
   plants: Plant[];
   onCompleteBulkTasks: (tasks: CareTask[]) => void;
@@ -19,6 +20,7 @@ export function HomeView({
   careTasks,
   dueCount,
   error,
+  groups,
   isLoading,
   plants,
   onCompleteBulkTasks,
@@ -31,6 +33,7 @@ export function HomeView({
   const [selectedDate, setSelectedDate] = useState(() => weekDays[0]?.dateKey ?? getDateKey(new Date()));
   const selectedDay = weekDays.find((day) => day.dateKey === selectedDate) ?? weekDays[0];
   const selectedTasks = getTasksForDate(careTasks, selectedDate);
+  const groupDueTaskGroups = getGroupDueTaskGroups(careTasks, groups);
 
   return (
     <>
@@ -136,6 +139,31 @@ export function HomeView({
             </>
           ) : null}
 
+          {groupDueTaskGroups.length > 0 ? (
+            <>
+              <p className="task-list-label">Group actions</p>
+              {groupDueTaskGroups.map((group) => (
+                <article className="task-row task-row-group" key={`${group.groupId}-${group.careActivityId}`}>
+                  <span className="status-dot due" />
+                  <div>
+                    <h3>{group.groupName} / {group.action}</h3>
+                    <p>
+                      {group.tasks.length} due - {formatPlantNames(group.tasks)}
+                    </p>
+                  </div>
+                  <button
+                    className="small-action"
+                    type="button"
+                    onClick={() => onCompleteBulkTasks(group.tasks)}
+                  >
+                    <CalendarCheck size={16} />
+                    Log group
+                  </button>
+                </article>
+              ))}
+            </>
+          ) : null}
+
           {careTasks.length > 0 ? (
             <>
               <p className="task-list-label">Individual tasks</p>
@@ -206,6 +234,20 @@ function groupDueTasks(tasks: CareTask[]) {
   return [...groups.values()].sort((left, right) => left.action.localeCompare(right.action));
 }
 
+function getGroupDueTaskGroups(tasks: CareTask[], groups: PlantGroup[]) {
+  const dueTasks = tasks.filter((task) => task.status === 'due');
+
+  return groups.flatMap((group) => {
+    const groupPlantIds = new Set(group.plants.map((plant) => plant.id));
+    return groupDueTasks(dueTasks.filter((task) => groupPlantIds.has(task.plantId)))
+      .map((taskGroup) => ({
+        ...taskGroup,
+        groupId: group.id,
+        groupName: group.name,
+      }));
+  });
+}
+
 function formatPlantNames(tasks: CareTask[]) {
   const names = tasks.map((task) => task.plantName);
   if (names.length <= 3) {

plant-manager-web/src/components/PlantCard.tsx

@@ -30,6 +30,15 @@ export function PlantCard({ plant, onOpen }: PlantCardProps) {
               ))}
           </div>
         ) : null}
+        {plant.groups.length > 0 ? (
+          <div className="flag-list">
+            {plant.groups.map((group) => (
+              <span className="flag-chip group-chip" key={group.id}>
+                {group.name}
+              </span>
+            ))}
+          </div>
+        ) : null}
       </div>
       <dl>
         <div>

plant-manager-web/src/components/PlantManagementView.tsx

@@ -93,6 +93,19 @@ export function PlantManagementView({
 
       {selectedPlant ? (
         <div className="plant-detail-grid">
+          <section className="detail-section detail-section-wide" aria-labelledby="plant-management-life">
+            <div className="detail-section-heading">
+              <Check size={17} />
+              <h3 id="plant-management-life">Plant History</h3>
+            </div>
+            <div className="plant-detail-meta compact-meta">
+              <div>
+                <span>Birthday</span>
+                <strong>{selectedPlant.birthday ?? 'Not set'}</strong>
+              </div>
+            </div>
+          </section>
+
           <section className="detail-section" aria-labelledby="plant-management-taxa">
             <div className="detail-section-heading">
               <Tags size={17} />

plant-manager-web/src/components/PlantsView.tsx

@@ -1,4 +1,4 @@
-import { Edit3, Plus, Save, Trash2, X } from 'lucide-react';
+import { Edit3, Eye, Plus, Save, Trash2, X } from 'lucide-react';
 import type { Plant } from '../domain';
 import type { PlantFormState } from '../form-state';
 
@@ -10,11 +10,14 @@ type PlantsViewProps = {
   isPlantEditorOpen: boolean;
   isSaving: boolean;
   plants: Plant[];
+  selectedPlant?: Plant;
   onCancel: () => void;
+  onCloseDetail: () => void;
   onDelete: (plant: Plant) => void;
   onEdit: (plant: Plant) => void;
   onFieldChange: (field: keyof PlantFormState, value: string) => void;
   onNew: () => void;
+  onOpenDetail: (plant: Plant) => void;
   onSave: () => void;
 };
 
@@ -26,11 +29,14 @@ export function PlantsView({
   isPlantEditorOpen,
   isSaving,
   plants,
+  selectedPlant,
   onCancel,
+  onCloseDetail,
   onDelete,
   onEdit,
   onFieldChange,
   onNew,
+  onOpenDetail,
   onSave,
 }: PlantsViewProps) {
   return (
@@ -69,6 +75,14 @@ export function PlantsView({
                 onChange={(event) => onFieldChange('nickname', event.target.value)}
               />
             </label>
+            <label>
+              Birthday
+              <input
+                type="date"
+                value={form.birthday}
+                onChange={(event) => onFieldChange('birthday', event.target.value)}
+              />
+            </label>
           </div>
 
           <div className="form-actions">
@@ -83,6 +97,53 @@ export function PlantsView({
         </section>
       ) : null}
 
+      {selectedPlant && !isPlantEditorOpen ? (
+        <section className="editor-panel" aria-labelledby="plant-detail-heading">
+          <div className="section-heading">
+            <div>
+              <p className="eyebrow">Plant detail</p>
+              <h2 id="plant-detail-heading">{selectedPlant.nickname}</h2>
+            </div>
+            <div className="row-actions">
+              <button className="icon-button compact" type="button" aria-label={`Edit ${selectedPlant.nickname}`} onClick={() => onEdit(selectedPlant)}>
+                <Edit3 size={17} />
+              </button>
+              <button className="icon-button compact" type="button" aria-label="Close plant detail" onClick={onCloseDetail}>
+                <X size={18} />
+              </button>
+            </div>
+          </div>
+
+          <div className="plant-detail-meta compact-meta">
+            <div>
+              <span>Birthday</span>
+              <strong>{selectedPlant.birthday ?? 'Not set'}</strong>
+            </div>
+            <div>
+              <span>Location</span>
+              <strong>{selectedPlant.location}</strong>
+            </div>
+            <div>
+              <span>Taxon</span>
+              <strong>{selectedPlant.taxon}</strong>
+            </div>
+            <div>
+              <span>Next care</span>
+              <strong>{selectedPlant.nextCare}</strong>
+            </div>
+            <div className="meta-wide">
+              <span>Groups</span>
+              <strong>{selectedPlant.groups.length > 0 ? selectedPlant.groups.map((group) => group.name).join(', ') : 'None'}</strong>
+            </div>
+          </div>
+
+          <div className="detail-section-heading">
+            <h3>Timeline</h3>
+          </div>
+          <PlantTimeline plant={selectedPlant} />
+        </section>
+      ) : null}
+
       <section className="section" aria-labelledby="plants-list-heading">
         <div className="section-heading">
           <h2 id="plants-list-heading">All Plants</h2>
@@ -97,8 +158,15 @@ export function PlantsView({
             <article className="plant-row" key={plant.id}>
               <div>
                 <h3>{plant.nickname}</h3>
+                <p>
+                  {plant.birthday ? `Birthday ${plant.birthday}` : 'No birthday'}
+                  {plant.groups.length > 0 ? ` - ${plant.groups.map((group) => group.name).join(', ')}` : ''}
+                </p>
               </div>
               <div className="row-actions">
+                <button className="icon-button compact" type="button" aria-label={`View ${plant.nickname}`} onClick={() => onOpenDetail(plant)}>
+                  <Eye size={17} />
+                </button>
                 <button className="icon-button compact" type="button" aria-label={`Edit ${plant.nickname}`} onClick={() => onEdit(plant)}>
                   <Edit3 size={17} />
                 </button>
@@ -113,3 +181,51 @@ export function PlantsView({
     </>
   );
 }
+
+function PlantTimeline({ plant }: { plant: Plant }) {
+  const timelineItems = [
+    ...(plant.birthday ? [{
+      date: plant.birthday,
+      title: 'Birthday',
+      detail: `${plant.nickname} joined the collection.`,
+    }] : []),
+    ...plant.actionLogs.map((log) => ({
+      date: log.performedOn,
+      title: log.action,
+      detail: formatLogDetail(log),
+    })),
+  ].sort((left, right) => right.date.localeCompare(left.date));
+
+  if (timelineItems.length === 0) {
+    return <p className="empty-state">No timeline entries yet.</p>;
+  }
+
+  return (
+    <div className="timeline-list">
+      {timelineItems.map((item, index) => (
+        <article className="timeline-item" key={`${item.date}-${item.title}-${index}`}>
+          <time>{item.date}</time>
+          <div>
+            <h4>{item.title}</h4>
+            <p>{item.detail}</p>
+          </div>
+        </article>
+      ))}
+    </div>
+  );
+}
+
+function formatLogDetail(log: Plant['actionLogs'][number]) {
+  const resources = log.resources.map((resource) => {
+    const amount = resource.quantity === null
+      ? ''
+      : ` (${resource.quantity}${resource.unit ? ` ${resource.unit}` : ''})`;
+    return `${resource.name}${amount}`;
+  });
+  const parts = [
+    log.notes,
+    resources.length > 0 ? resources.join(', ') : null,
+  ].filter(Boolean);
+
+  return parts.length > 0 ? parts.join(' - ') : 'Care logged.';
+}

plant-manager-web/src/components/RecipesView.tsx

@@ -0,0 +1,560 @@
+import { useState } from 'react';
+import { Edit3, Eye, Plus, Save, Trash2, X } from 'lucide-react';
+import type { ActionResource, Recipe } from '../domain';
+import type { RecipeFormState } from '../form-state';
+
+type RecipesViewProps = {
+  activeRecipeName?: string;
+  error: string | null;
+  form: RecipeFormState;
+  isEditorOpen: boolean;
+  isLoading: boolean;
+  isSaving: boolean;
+  recipes: Recipe[];
+  resources: ActionResource[];
+  selectedRecipe?: Recipe;
+  onCancel: () => void;
+  onCloseDetail: () => void;
+  onDelete: (recipe: Recipe) => void;
+  onEdit: (recipe: Recipe) => void;
+  onFieldChange: <Field extends keyof RecipeFormState>(
+    field: Field,
+    value: RecipeFormState[Field],
+  ) => void;
+  onNew: () => void;
+  onOpenDetail: (recipe: Recipe) => void;
+  onSave: () => void;
+};
+
+export function RecipesView({
+  activeRecipeName,
+  error,
+  form,
+  isEditorOpen,
+  isLoading,
+  isSaving,
+  recipes,
+  resources,
+  selectedRecipe,
+  onCancel,
+  onCloseDetail,
+  onDelete,
+  onEdit,
+  onFieldChange,
+  onNew,
+  onOpenDetail,
+  onSave,
+}: RecipesViewProps) {
+  const [calculatorAmounts, setCalculatorAmounts] = useState<Record<number, string>>({});
+
+  function updateComponent(index: number, nextComponent: RecipeFormState['components'][number]) {
+    onFieldChange(
+      'components',
+      form.components.map((component, componentIndex) => componentIndex === index ? nextComponent : component),
+    );
+  }
+
+  function addComponent() {
+    onFieldChange('components', [
+      ...form.components,
+      { actionResourceId: '', quantity: '', unit: '', notes: '' },
+    ]);
+  }
+
+  function hasIncompleteComponents() {
+    if (form.components.some((component) => !component.actionResourceId)) {
+      return true;
+    }
+
+    if (form.measurementMode === 'quantity') {
+      return false;
+    }
+
+    if (form.components.some((component) => !component.quantity.trim())) {
+      return true;
+    }
+
+    if (form.measurementMode === 'total_percent') {
+      return getPercentTotal(form) !== 100;
+    }
+
+    return !form.components.some((component) => Number(component.quantity) === 100);
+  }
+
+  const isPercentRecipe = form.measurementMode !== 'quantity';
+  const amountHeading = getAmountHeading(form.measurementMode);
+  const selectedRecipeCalculatorAmount = selectedRecipe
+    ? calculatorAmounts[selectedRecipe.id] ?? ''
+    : '';
+
+  return (
+    <>
+      <section className="summary-panel" aria-labelledby="recipes-summary-heading">
+        <div>
+          <p className="eyebrow">Recipe catalog</p>
+          <h2 id="recipes-summary-heading">
+            {isLoading ? 'Loading recipes' : `${recipes.length} recipes`}
+          </h2>
+          <p>{error ?? 'Build reusable mixes and solutions, then create the resource they produce.'}</p>
+        </div>
+        <button className="primary-action" type="button" onClick={onNew}>
+          <Plus size={18} />
+          New recipe
+        </button>
+      </section>
+
+      {selectedRecipe && !isEditorOpen ? (
+        <section className="editor-panel" aria-labelledby="recipe-detail-heading">
+          <div className="section-heading">
+            <div>
+              <p className="eyebrow">Recipe detail</p>
+              <h2 id="recipe-detail-heading">{selectedRecipe.name}</h2>
+            </div>
+            <div className="row-actions">
+              <button className="icon-button compact" type="button" aria-label={`Edit ${selectedRecipe.name}`} onClick={() => onEdit(selectedRecipe)}>
+                <Edit3 size={17} />
+              </button>
+              <button className="icon-button compact" type="button" aria-label="Close recipe detail" onClick={onCloseDetail}>
+                <X size={18} />
+              </button>
+            </div>
+          </div>
+          <div className="plant-detail-meta compact-meta">
+            <div>
+              <span>Type</span>
+              <strong>{selectedRecipe.type}</strong>
+            </div>
+            <div>
+              <span>Mode</span>
+              <strong>{formatMeasurementMode(selectedRecipe.measurementMode)}</strong>
+            </div>
+            <div>
+              <span>Output resource</span>
+              <strong>{selectedRecipe.outputResource?.name ?? 'None'}</strong>
+            </div>
+            <div>
+              <span>Components</span>
+              <strong>{selectedRecipe.components.length}</strong>
+            </div>
+            <div className="meta-wide">
+              <span>Procedure</span>
+              <strong className="preserve-lines">{selectedRecipe.notes ?? 'No procedure'}</strong>
+            </div>
+          </div>
+          <RecipeDetailTable
+            amount={selectedRecipeCalculatorAmount}
+            recipe={selectedRecipe}
+            onAmountChange={(nextAmount) => setCalculatorAmounts((current) => ({
+              ...current,
+              [selectedRecipe.id]: nextAmount,
+            }))}
+          />
+        </section>
+      ) : null}
+
+      {isEditorOpen ? (
+        <section className="editor-panel" aria-labelledby="recipe-editor-heading">
+          <div className="section-heading">
+            <div>
+              <p className="eyebrow">{activeRecipeName ? 'Editing' : 'New recipe'}</p>
+              <h2 id="recipe-editor-heading">{activeRecipeName ?? 'Recipe details'}</h2>
+            </div>
+            <button className="icon-button compact" type="button" aria-label="Clear form" onClick={onCancel}>
+              <X size={18} />
+            </button>
+          </div>
+
+          <div className="plant-form">
+            <label>
+              Name
+              <input
+                value={form.name}
+                onChange={(event) => onFieldChange('name', event.target.value)}
+              />
+            </label>
+            <label>
+              Type
+              <select
+                value={form.type}
+                onChange={(event) => onFieldChange('type', event.target.value)}
+              >
+                <option value="Soil mixture">Soil mixture</option>
+                <option value="Fertilizer solution">Fertilizer solution</option>
+                <option value="Treatment">Treatment</option>
+                <option value="Other">Other</option>
+              </select>
+            </label>
+            <label>
+              Mode
+              <select
+                value={form.measurementMode}
+                onChange={(event) => onFieldChange('measurementMode', event.target.value as RecipeFormState['measurementMode'])}
+              >
+                <option value="quantity">Quantity</option>
+                <option value="total_percent">Percent of total</option>
+                <option value="bakers_percent">Percent of base</option>
+              </select>
+            </label>
+            <label>
+              Produced resource
+              <input
+                value={form.outputResourceName}
+                onChange={(event) => onFieldChange('outputResourceName', event.target.value)}
+              />
+            </label>
+            <fieldset className="resource-picker schedule-picker">
+              <legend>Components</legend>
+
+              {form.components.length === 0 ? (
+                <p className="empty-state">No components configured.</p>
+              ) : (
+                <div className={`activity-resource-header recipe-resource-header ${isPercentRecipe ? 'recipe-resource-row-percent' : ''}`} aria-hidden="true">
+                  <span>Resource</span>
+                  <span>{amountHeading}</span>
+                  {isPercentRecipe ? null : <span>Unit</span>}
+                  <span>Notes</span>
+                  <span />
+                </div>
+              )}
+
+              {form.components.map((component, componentIndex) => {
+                const selectedResourceIds = new Set(
+                  form.components
+                    .filter((_, index) => index !== componentIndex)
+                    .map((item) => item.actionResourceId),
+                );
+
+                return (
+                  <div className={`activity-resource-row recipe-resource-row ${isPercentRecipe ? 'recipe-resource-row-percent' : ''}`} key={`${component.actionResourceId}-${componentIndex}`}>
+                    <select
+                      aria-label="Component resource"
+                      value={component.actionResourceId}
+                      onChange={(event) => updateComponent(
+                        componentIndex,
+                        { ...component, actionResourceId: event.target.value },
+                      )}
+                    >
+                      <option value="">Select a resource</option>
+                      {resources
+                        .filter((resource) => !selectedResourceIds.has(String(resource.id)))
+                        .map((resource) => (
+                          <option key={resource.id} value={resource.id}>
+                            {resource.name}
+                          </option>
+                        ))}
+                    </select>
+                    <input
+                      aria-label={amountHeading}
+                      min="0"
+                      step="0.01"
+                      type="number"
+                      value={component.quantity}
+                      onChange={(event) => updateComponent(
+                        componentIndex,
+                        { ...component, quantity: event.target.value },
+                      )}
+                    />
+                    {isPercentRecipe ? null : (
+                      <input
+                        aria-label="Unit"
+                        value={component.unit}
+                        onChange={(event) => updateComponent(
+                          componentIndex,
+                          { ...component, unit: event.target.value },
+                        )}
+                      />
+                    )}
+                    <input
+                      aria-label="Component notes"
+                      value={component.notes}
+                      onChange={(event) => updateComponent(
+                        componentIndex,
+                        { ...component, notes: event.target.value },
+                      )}
+                    />
+                    <button
+                      className="icon-button compact danger"
+                      type="button"
+                      aria-label="Remove component"
+                      onClick={() => onFieldChange(
+                        'components',
+                        form.components.filter((_, index) => index !== componentIndex),
+                      )}
+                    >
+                      <Trash2 size={17} />
+                    </button>
+                  </div>
+                );
+              })}
+
+              <button
+                className="small-action"
+                type="button"
+                disabled={resources.length === 0}
+                onClick={addComponent}
+              >
+                <Plus size={16} />
+                Add component
+              </button>
+              {form.measurementMode === 'total_percent' ? (
+                <p className="schedule-hint">Total: {getPercentTotal(form)}%</p>
+              ) : null}
+            </fieldset>
+            <label className="form-wide">
+              Procedure
+              <textarea
+                value={form.notes}
+                onChange={(event) => onFieldChange('notes', event.target.value)}
+              />
+            </label>
+          </div>
+
+          <div className="form-actions">
+            <button className="primary-action" type="button" disabled={isSaving || !form.outputResourceName.trim() || form.components.length === 0 || hasIncompleteComponents()} onClick={onSave}>
+              <Save size={18} />
+              {isSaving ? 'Saving' : 'Save recipe'}
+            </button>
+            <button className="text-button" type="button" onClick={onCancel}>
+              Cancel
+            </button>
+          </div>
+        </section>
+      ) : null}
+
+      <section className="section" aria-labelledby="recipes-list-heading">
+        <div className="section-heading">
+          <h2 id="recipes-list-heading">All Recipes</h2>
+        </div>
+
+        <div className="plant-list">
+          {!isLoading && recipes.length === 0 ? (
+            <p className="empty-state">No recipes yet.</p>
+          ) : null}
+
+          {recipes.map((recipe) => (
+            <article className="plant-row" key={recipe.id}>
+              <div>
+                <h3>{recipe.name}</h3>
+                <p>{recipe.type} - {formatMeasurementMode(recipe.measurementMode)} - {formatRecipeSummary(recipe)}</p>
+              </div>
+              <div className="row-actions">
+                <button className="icon-button compact" type="button" aria-label={`View ${recipe.name}`} onClick={() => onOpenDetail(recipe)}>
+                  <Eye size={17} />
+                </button>
+                <button className="icon-button compact" type="button" aria-label={`Edit ${recipe.name}`} onClick={() => onEdit(recipe)}>
+                  <Edit3 size={17} />
+                </button>
+                <button className="icon-button compact danger" type="button" aria-label={`Delete ${recipe.name}`} onClick={() => onDelete(recipe)}>
+                  <Trash2 size={17} />
+                </button>
+              </div>
+            </article>
+          ))}
+        </div>
+      </section>
+    </>
+  );
+}
+
+function formatRecipeSummary(recipe: Recipe) {
+  if (recipe.components.length === 0) {
+    return 'No components';
+  }
+
+  return recipe.components
+    .map((component) => `${component.name}${formatComponentAmount(component.quantity, component.unit, recipe.measurementMode, true)}`)
+    .join(', ');
+}
+
+function RecipeDetailTable({
+  amount,
+  recipe,
+  onAmountChange,
+}: {
+  amount: string;
+  recipe: Recipe;
+  onAmountChange: (amount: string) => void;
+}) {
+  if (recipe.components.length === 0) {
+    return (
+      <div className="detail-list">
+        <p className="empty-state">No components configured.</p>
+      </div>
+    );
+  }
+
+  const sortedComponents = [...recipe.components].sort((left, right) => {
+    if (recipe.measurementMode === 'bakers_percent') {
+      if (left.quantity === 100 && right.quantity !== 100) {
+        return -1;
+      }
+
+      if (right.quantity === 100 && left.quantity !== 100) {
+        return 1;
+      }
+    }
+
+    return left.sortOrder - right.sortOrder;
+  });
+  const baseComponent = sortedComponents.find((component) => component.quantity === 100);
+  const numericAmount = Number(amount);
+  const canCalculate = amount.trim() !== '' && Number.isFinite(numericAmount);
+
+  if (recipe.measurementMode === 'quantity') {
+    return (
+      <div className="recipe-table" role="table" aria-label="Recipe components">
+        <div className="recipe-table-row recipe-table-heading" role="row">
+          <span role="columnheader">Ingredient / Resource</span>
+          <span role="columnheader">Quantity</span>
+          <span role="columnheader">Notes</span>
+        </div>
+        {sortedComponents.map((component) => (
+          <div className="recipe-table-row" role="row" key={component.actionResourceId}>
+            <span role="cell">{component.name}</span>
+            <span role="cell">{formatComponentAmount(component.quantity, component.unit, recipe.measurementMode)}</span>
+            <span role="cell">{component.notes ?? 'No notes'}</span>
+          </div>
+        ))}
+      </div>
+    );
+  }
+
+  if (recipe.measurementMode === 'total_percent') {
+    return (
+      <div className="recipe-calculator">
+        <label className="recipe-calculator-input">
+          Total amount
+          <input
+            min="0"
+            step="0.01"
+            type="number"
+            value={amount}
+            onChange={(event) => onAmountChange(event.target.value)}
+          />
+        </label>
+        <PercentRecipeTable
+          getCalculatedAmount={(component) => canCalculate && component.quantity !== null
+            ? numericAmount * (component.quantity / 100)
+            : null}
+          recipe={recipe}
+          components={sortedComponents}
+        />
+      </div>
+    );
+  }
+
+  return (
+    <div className="recipe-calculator">
+      <div className="recipe-table" role="table" aria-label="Recipe calculator">
+        <div className="recipe-table-row recipe-table-heading" role="row">
+          <span role="columnheader">Ingredient / Resource</span>
+          <span role="columnheader">Percent</span>
+          <span role="columnheader">Amount</span>
+        </div>
+        {sortedComponents.map((component) => {
+          const isBase = baseComponent?.actionResourceId === component.actionResourceId;
+          const calculatedAmount = canCalculate && component.quantity !== null
+            ? numericAmount * (component.quantity / 100)
+            : null;
+
+          return (
+            <div className="recipe-table-row" role="row" key={component.actionResourceId}>
+              <span role="cell">{component.name}</span>
+              <span role="cell">{formatComponentAmount(component.quantity, component.unit, recipe.measurementMode)}</span>
+              <span role="cell">
+                {isBase ? (
+                  <input
+                    aria-label={`${component.name} base amount`}
+                    min="0"
+                    step="0.01"
+                    type="number"
+                    value={amount}
+                    onChange={(event) => onAmountChange(event.target.value)}
+                  />
+                ) : formatCalculatedAmount(calculatedAmount)}
+              </span>
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
+function PercentRecipeTable({
+  components,
+  getCalculatedAmount,
+  recipe,
+}: {
+  components: Recipe['components'];
+  getCalculatedAmount: (component: Recipe['components'][number]) => number | null;
+  recipe: Recipe;
+}) {
+  return (
+    <div className="recipe-table" role="table" aria-label="Recipe calculator">
+      <div className="recipe-table-row recipe-table-heading" role="row">
+        <span role="columnheader">Ingredient / Resource</span>
+        <span role="columnheader">Percent</span>
+        <span role="columnheader">Amount</span>
+      </div>
+      {components.map((component) => (
+        <div className="recipe-table-row" role="row" key={component.actionResourceId}>
+          <span role="cell">{component.name}</span>
+          <span role="cell">{formatComponentAmount(component.quantity, component.unit, recipe.measurementMode)}</span>
+          <span role="cell">{formatCalculatedAmount(getCalculatedAmount(component))}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
+
+function formatComponentAmount(
+  quantity: number | null,
+  unit: string | null,
+  measurementMode: Recipe['measurementMode'],
+  compact = false,
+) {
+  if (quantity === null) {
+    return compact ? '' : 'No value';
+  }
+
+  const suffix = measurementMode === 'quantity'
+    ? unit ? ` ${unit}` : ''
+    : '%';
+
+  return `${compact ? ' (' : ''}${quantity}${suffix}${compact ? ')' : ''}`;
+}
+
+function formatMeasurementMode(measurementMode: Recipe['measurementMode']) {
+  switch (measurementMode) {
+    case 'total_percent':
+      return 'Percent of total';
+    case 'bakers_percent':
+      return 'Percent of base';
+    default:
+      return 'Quantity';
+  }
+}
+
+function getAmountHeading(measurementMode: RecipeFormState['measurementMode']) {
+  switch (measurementMode) {
+    case 'total_percent':
+      return '% of total';
+    case 'bakers_percent':
+      return '% of base';
+    default:
+      return 'Qty';
+  }
+}
+
+function getPercentTotal(form: RecipeFormState) {
+  return form.components.reduce((total, component) => total + Number(component.quantity || 0), 0);
+}
+
+function formatCalculatedAmount(amount: number | null) {
+  if (amount === null) {
+    return '';
+  }
+
+  return Number.isInteger(amount) ? String(amount) : amount.toFixed(2);
+}

plant-manager-web/src/components/ResourcesView.tsx

@@ -76,6 +76,12 @@ export function ResourcesView({
               <span>Notes</span>
               <strong>{selectedResource.notes ?? 'No notes'}</strong>
             </div>
+            {selectedResource.producedByRecipe ? (
+              <div>
+                <span>Produced by recipe</span>
+                <strong>{selectedResource.producedByRecipe.name}</strong>
+              </div>
+            ) : null}
           </div>
         </section>
       ) : null}
@@ -136,7 +142,9 @@ export function ResourcesView({
               <div>
                 <h3>{resource.name}</h3>
                 <p>
-                  {resource.notes ?? 'No notes'}
+                  {resource.producedByRecipe
+                    ? `Produced by ${resource.producedByRecipe.name}`
+                    : resource.notes ?? 'No notes'}
                 </p>
               </div>
               <div className="row-actions">

plant-manager-web/src/components/SchedulesView.tsx

@@ -1,12 +1,13 @@
 import { CalendarClock, Save, Trash2 } from 'lucide-react';
 import { useMemo, useState } from 'react';
-import type { CareActivity, Plant } from '../domain';
+import type { CareActivity, Plant, PlantGroup } from '../domain';
 import type { BulkScheduleFormState } from '../form-state';
 
 type SchedulesViewProps = {
   activities: CareActivity[];
   error: string | null;
   form: BulkScheduleFormState;
+  groups: PlantGroup[];
   isLoading: boolean;
   isSaving: boolean;
   plants: Plant[];
@@ -38,6 +39,7 @@ export function SchedulesView({
   activities,
   error,
   form,
+  groups,
   isLoading,
   isSaving,
   plants,
@@ -46,12 +48,14 @@ export function SchedulesView({
   onSave,
 }: SchedulesViewProps) {
   const [plantQuery, setPlantQuery] = useState('');
+  const [selectedGroupId, setSelectedGroupId] = useState('');
   const visiblePlants = useMemo(
     () => filterPlants(plants, plantQuery),
     [plants, plantQuery],
   );
   const selectedPlantIds = new Set(form.plantIds);
   const selectedPlants = plants.filter((plant) => selectedPlantIds.has(String(plant.id)));
+  const selectedGroup = groups.find((group) => String(group.id) === selectedGroupId);
   const selectedActivity = activities.find((activity) => String(activity.id) === form.careActivityId);
   const preview = selectedActivity ? formatSchedulePreview(selectedActivity.name, form) : '';
   const allVisibleSelected = visiblePlants.length > 0 && visiblePlants.every((plant) => selectedPlantIds.has(String(plant.id)));
@@ -79,7 +83,7 @@ export function SchedulesView({
           </div>
           <div className="schedule-count">
             <CalendarClock size={16} />
-            <span>{selectedPlants.length} selected</span>
+            <span>{selectedGroup ? `${selectedGroup.name}: ${selectedPlants.length} plants` : `${selectedPlants.length} selected`}</span>
           </div>
         </div>
 
@@ -108,6 +112,27 @@ export function SchedulesView({
               onChange={(event) => onFieldChange('scheduledFor', event.target.value)}
             />
           </label>
+          <label>
+            Target group
+            <select
+              disabled={isSaving}
+              value={selectedGroupId}
+              onChange={(event) => {
+                const groupId = event.target.value;
+                const group = groups.find((item) => String(item.id) === groupId);
+                setSelectedGroupId(groupId);
+                setPlantQuery('');
+                onFieldChange('plantIds', group ? group.plants.map((plant) => String(plant.id)) : []);
+              }}
+            >
+              <option value="">Individual plants</option>
+              {groups.map((group) => (
+                <option key={group.id} value={group.id}>
+                  {group.name} ({group.plants.length})
+                </option>
+              ))}
+            </select>
+          </label>
         </div>
 
         <fieldset className="schedule-options">
@@ -247,12 +272,15 @@ export function SchedulesView({
                 className="text-button"
                 type="button"
                 disabled={isSaving}
-                onClick={() => onFieldChange(
-                  'plantIds',
-                  allVisibleSelected
-                    ? form.plantIds.filter((id) => !visiblePlants.some((plant) => String(plant.id) === id))
-                    : [...new Set([...form.plantIds, ...visiblePlants.map((plant) => String(plant.id))])],
-                )}
+                onClick={() => {
+                  setSelectedGroupId('');
+                  onFieldChange(
+                    'plantIds',
+                    allVisibleSelected
+                      ? form.plantIds.filter((id) => !visiblePlants.some((plant) => String(plant.id) === id))
+                      : [...new Set([...form.plantIds, ...visiblePlants.map((plant) => String(plant.id))])],
+                  );
+                }}
               >
                 {allVisibleSelected ? 'Clear visible' : 'Select visible'}
               </button>
@@ -291,6 +319,7 @@ export function SchedulesView({
                       const nextPlantIds = event.target.checked
                         ? [...form.plantIds, plantId]
                         : form.plantIds.filter((id) => id !== plantId);
+                      setSelectedGroupId('');
                       onFieldChange('plantIds', nextPlantIds);
                     }}
                   />
@@ -303,11 +332,27 @@ export function SchedulesView({
         </div>
 
         <div className="form-actions">
-          <button className="primary-action" type="button" disabled={isSaving || form.plantIds.length === 0 || !form.careActivityId} onClick={onSave}>
+          <button
+            className="primary-action"
+            type="button"
+            disabled={isSaving || form.plantIds.length === 0 || !form.careActivityId}
+            onClick={() => {
+              onSave();
+              setSelectedGroupId('');
+            }}
+          >
             <Save size={18} />
-            {isSaving ? 'Saving' : `Apply to ${form.plantIds.length} plants`}
+            {isSaving ? 'Saving' : selectedGroup ? `Apply to ${selectedGroup.name}` : `Apply to ${form.plantIds.length} plants`}
           </button>
-          <button className="text-button danger" type="button" disabled={isSaving || form.plantIds.length === 0 || !form.careActivityId} onClick={onRemove}>
+          <button
+            className="text-button danger"
+            type="button"
+            disabled={isSaving || form.plantIds.length === 0 || !form.careActivityId}
+            onClick={() => {
+              onRemove();
+              setSelectedGroupId('');
+            }}
+          >
             <Trash2 size={16} />
             Remove from {form.plantIds.length} plants
           </button>

plant-manager-web/src/domain.ts

@@ -3,6 +3,7 @@ export type CareStatus = 'due' | 'soon' | 'ok' | 'unscheduled';
 export type Plant = {
   id: number;
   nickname: string;
+  birthday: string | null;
   taxonId: number | null;
   taxon: string;
   locationId: number | null;
@@ -10,6 +11,8 @@ export type Plant = {
   nextCare: string;
   status: CareStatus;
   flags: PlantFlag[];
+  groups: PlantGroupSummary[];
+  actionLogs: ActionLog[];
   careSchedules: PlantCareSchedule[];
 };
 
@@ -36,6 +39,7 @@ export type PlantCareSchedule = {
 export type ScheduleRecurrenceMode = 'none' | 'daily' | 'weekly' | 'monthly' | 'yearly' | 'custom';
 export type ScheduleRepeatUnit = 'day' | 'week' | 'month' | 'year';
 export type ScheduleEndsMode = 'on' | 'after';
+export type RecipeMeasurementMode = 'quantity' | 'total_percent' | 'bakers_percent';
 
 export type PlantTaxon = {
   id: number;
@@ -53,6 +57,23 @@ export type PlantLocation = {
   notes: string | null;
 };
 
+export type PlantGroupSummary = {
+  id: number;
+  name: string;
+};
+
+export type PlantGroupMember = {
+  id: number;
+  nickname: string;
+};
+
+export type PlantGroup = {
+  id: number;
+  name: string;
+  plants: PlantGroupMember[];
+  notes: string | null;
+};
+
 export type CareAction = {
   id: number;
   name: string;
@@ -63,6 +84,38 @@ export type ActionResource = {
   id: number;
   name: string;
   notes: string | null;
+  producedByRecipe: RecipeSummary | null;
+};
+
+export type ActionResourceSummary = {
+  id: number;
+  name: string;
+};
+
+export type RecipeSummary = {
+  id: number;
+  name: string;
+  type: string;
+  measurementMode: RecipeMeasurementMode;
+};
+
+export type Recipe = {
+  id: number;
+  name: string;
+  type: string;
+  measurementMode: RecipeMeasurementMode;
+  outputResource: ActionResourceSummary | null;
+  components: RecipeComponent[];
+  notes: string | null;
+};
+
+export type RecipeComponent = {
+  actionResourceId: number;
+  name: string;
+  quantity: number | null;
+  unit: string | null;
+  notes: string | null;
+  sortOrder: number;
 };
 
 export type CareActivity = {
@@ -106,8 +159,28 @@ export type PlantFlag = {
   notes: string | null;
 };
 
+export type ActionLog = {
+  id: number;
+  plantId: number;
+  plantName: string;
+  careActivityId: number;
+  careActionId: number;
+  action: string;
+  notes: string | null;
+  performedOn: string;
+  resources: ActionLogResource[];
+};
+
+export type ActionLogResource = {
+  actionResourceId: number;
+  name: string;
+  quantity: number | null;
+  unit: string | null;
+};
+
 export type PlantPayload = {
   nickname: string;
+  birthday: string | null;
   taxonId: number | null;
   locationId: number | null;
   careSchedules: PlantCareSchedulePayload[] | null;
@@ -154,6 +227,12 @@ export type PlantLocationPayload = {
   notes: string | null;
 };
 
+export type PlantGroupPayload = {
+  name: string;
+  plantIds: number[];
+  notes: string | null;
+};
+
 export type CareActionPayload = {
   name: string;
   description: string | null;
@@ -182,6 +261,22 @@ export type CareActivityActionResourcePayload = {
   notes: string | null;
 };
 
+export type RecipePayload = {
+  name: string;
+  type: string;
+  measurementMode: RecipeMeasurementMode;
+  outputResourceName: string | null;
+  components: RecipeComponentPayload[];
+  notes: string | null;
+};
+
+export type RecipeComponentPayload = {
+  actionResourceId: number;
+  quantity: number | null;
+  unit: string | null;
+  notes: string | null;
+};
+
 export type PlantFlagDefinitionPayload = {
   name: string;
   color: string | null;

plant-manager-web/src/form-state.ts

@@ -6,13 +6,18 @@ import type {
   CareAction,
   CareActionPayload,
   BulkPlantCareSchedulePayload,
+  Recipe,
+  RecipePayload,
   Plant,
   AssignPlantFlagPayload,
   PlantPayload,
   PlantFlagDefinition,
   PlantFlagDefinitionPayload,
+  PlantGroup,
+  PlantGroupPayload,
   PlantLocation,
   PlantLocationPayload,
+  RecipeMeasurementMode,
   ScheduleEndsMode,
   ScheduleRecurrenceMode,
   ScheduleRepeatUnit,
@@ -22,6 +27,7 @@ import type {
 
 export const emptyPlantForm = {
   nickname: '',
+  birthday: '',
 };
 
 export const emptyTaxonForm = {
@@ -38,6 +44,12 @@ export const emptyLocationForm = {
   notes: '',
 };
 
+export const emptyPlantGroupForm = {
+  name: '',
+  plantIds: [] as string[],
+  notes: '',
+};
+
 export const emptyActionForm = {
   name: '',
   description: '',
@@ -54,6 +66,15 @@ export const emptyActivityForm = {
   notes: '',
 };
 
+export const emptyRecipeForm = {
+  name: '',
+  type: 'Soil mixture',
+  measurementMode: 'quantity' as RecipeMeasurementMode,
+  outputResourceName: '',
+  components: [] as RecipeComponentFormState[],
+  notes: '',
+};
+
 export type CareActivityActionResourceFormState = {
   actionResourceId: string;
   quantity: string;
@@ -66,6 +87,13 @@ export type CareActivityActionFormState = {
   resources: CareActivityActionResourceFormState[];
 };
 
+export type RecipeComponentFormState = {
+  actionResourceId: string;
+  quantity: string;
+  unit: string;
+  notes: string;
+};
+
 export const emptyFlagDefinitionForm = {
   name: '',
   color: '#f2f2f2',
@@ -94,23 +122,27 @@ export const emptyBulkScheduleForm = {
 export type PlantFormState = typeof emptyPlantForm;
 export type TaxonFormState = typeof emptyTaxonForm;
 export type LocationFormState = typeof emptyLocationForm;
+export type PlantGroupFormState = typeof emptyPlantGroupForm;
 export type ActionFormState = typeof emptyActionForm;
 export type ResourceFormState = typeof emptyResourceForm;
 export type ActivityFormState = typeof emptyActivityForm;
+export type RecipeFormState = typeof emptyRecipeForm;
 export type FlagDefinitionFormState = typeof emptyFlagDefinitionForm;
 export type PlantFlagFormState = typeof emptyPlantFlagForm;
 export type BulkScheduleFormState = typeof emptyBulkScheduleForm;
-export type View = 'home' | 'plants' | 'plant-management' | 'schedules' | 'taxa' | 'locations' | 'actions' | 'resources' | 'activities' | 'flags';
+export type View = 'home' | 'plants' | 'plant-management' | 'schedules' | 'taxa' | 'locations' | 'groups' | 'actions' | 'resources' | 'recipes' | 'activities' | 'flags';
 
 export function toPlantForm(plant: Plant): PlantFormState {
   return {
     nickname: plant.nickname,
+    birthday: plant.birthday ?? '',
   };
 }
 
 export function toPlantPayload(form: PlantFormState): PlantPayload {
   return {
     nickname: form.nickname.trim(),
+    birthday: form.birthday || null,
     taxonId: null,
     locationId: null,
     careSchedules: null,
@@ -131,6 +163,22 @@ export function toLocationPayload(form: LocationFormState): PlantLocationPayload
   };
 }
 
+export function toPlantGroupForm(group: PlantGroup): PlantGroupFormState {
+  return {
+    name: group.name,
+    plantIds: group.plants.map((plant) => String(plant.id)),
+    notes: group.notes ?? '',
+  };
+}
+
+export function toPlantGroupPayload(form: PlantGroupFormState): PlantGroupPayload {
+  return {
+    name: form.name.trim(),
+    plantIds: form.plantIds.map((id) => Number(id)),
+    notes: form.notes.trim() || null,
+  };
+}
+
 export function toTaxonForm(taxon: PlantTaxon): TaxonFormState {
   return {
     name: taxon.name,
@@ -213,6 +261,38 @@ export function toActivityPayload(form: ActivityFormState): CareActivityPayload
   };
 }
 
+export function toRecipeForm(recipe: Recipe): RecipeFormState {
+  return {
+    name: recipe.name,
+    type: recipe.type,
+    measurementMode: recipe.measurementMode,
+    outputResourceName: recipe.outputResource?.name ?? '',
+    components: recipe.components.map((component) => ({
+      actionResourceId: String(component.actionResourceId),
+      quantity: component.quantity === null ? '' : String(component.quantity),
+      unit: component.unit ?? '',
+      notes: component.notes ?? '',
+    })),
+    notes: recipe.notes ?? '',
+  };
+}
+
+export function toRecipePayload(form: RecipeFormState): RecipePayload {
+  return {
+    name: form.name.trim(),
+    type: form.type.trim(),
+    measurementMode: form.measurementMode,
+    outputResourceName: form.outputResourceName.trim() || null,
+    components: form.components.map((component) => ({
+      actionResourceId: Number(component.actionResourceId),
+      quantity: component.quantity.trim() ? Number(component.quantity) : null,
+      unit: form.measurementMode === 'quantity' ? component.unit.trim() || null : '%',
+      notes: component.notes.trim() || null,
+    })),
+    notes: form.notes.trim() || null,
+  };
+}
+
 export function toFlagDefinitionForm(flag: PlantFlagDefinition): FlagDefinitionFormState {
   return {
     name: flag.name,

plant-manager-web/src/styles.css

@@ -754,6 +754,7 @@ dd {
 
 .plant-form input,
 .plant-form select,
+.plant-form textarea,
 .flag-assignment-form input,
 .flag-assignment-form select {
   width: 100%;
@@ -766,6 +767,21 @@ dd {
   box-shadow: none;
 }
 
+.plant-form textarea {
+  min-height: 112px;
+  padding: 8px;
+  line-height: 1.35;
+  resize: vertical;
+}
+
+.plant-form .form-wide {
+  grid-column: 1 / -1;
+}
+
+.preserve-lines {
+  white-space: pre-wrap;
+}
+
 .plant-form input[type='color'] {
   padding: 2px;
 }
@@ -901,6 +917,10 @@ dd {
   padding: 0;
 }
 
+.recipe-resource-row-percent {
+  grid-template-columns: minmax(160px, 1.2fr) minmax(70px, 90px) minmax(140px, 1fr) auto;
+}
+
 .log-resource-header,
 .log-resource-row {
   grid-template-columns: minmax(160px, 1fr) minmax(70px, 90px) minmax(80px, 110px) auto;
@@ -1155,6 +1175,100 @@ dd {
   padding: 7px 8px;
 }
 
+.recipe-calculator {
+  display: grid;
+  gap: 8px;
+}
+
+.recipe-calculator-input {
+  display: grid;
+  max-width: 180px;
+  gap: 4px;
+  color: #4f5f54;
+  font-size: 0.78rem;
+  font-weight: 500;
+}
+
+.recipe-calculator-input input,
+.recipe-table input {
+  width: 100%;
+  min-height: 30px;
+  padding: 0 8px;
+  border: 1px solid #cfc4b4;
+  border-radius: 6px;
+  background: var(--field);
+  color: #24342c;
+}
+
+.recipe-table {
+  display: grid;
+  border-top: 1px solid var(--border);
+}
+
+.recipe-table-row {
+  display: grid;
+  grid-template-columns: minmax(180px, 1.4fr) minmax(90px, 120px) minmax(110px, 150px);
+  align-items: center;
+  gap: 10px;
+  min-height: 40px;
+  padding: 7px 8px;
+  border-bottom: 1px solid var(--border);
+  background: var(--panel);
+}
+
+.recipe-table-row:nth-child(even) {
+  background: var(--row);
+}
+
+.recipe-table-heading {
+  min-height: 32px;
+  background: #f3efe3;
+  color: var(--muted);
+  font-size: 0.76rem;
+  font-weight: 600;
+  text-transform: uppercase;
+}
+
+.recipe-table-row span {
+  min-width: 0;
+  overflow-wrap: anywhere;
+}
+
+.timeline-list {
+  display: grid;
+  border-top: 1px solid var(--border);
+}
+
+.timeline-item {
+  display: grid;
+  grid-template-columns: minmax(92px, 130px) minmax(0, 1fr);
+  gap: 12px;
+  min-height: 44px;
+  padding: 8px;
+  border-bottom: 1px solid var(--border);
+  background: var(--panel);
+}
+
+.timeline-item:nth-child(even) {
+  background: var(--row);
+}
+
+.timeline-item time {
+  color: var(--muted);
+  font-size: 0.78rem;
+  font-weight: 600;
+}
+
+.timeline-item h4 {
+  margin: 0 0 2px;
+}
+
+.timeline-item p {
+  color: #59675d;
+  font-size: 0.86rem;
+  line-height: 1.25;
+}
+
 .flag-list,
 .flag-assignment-form {
   display: flex;
@@ -1322,6 +1436,16 @@ dd {
     grid-template-columns: 1fr;
   }
 
+  .recipe-table-row {
+    grid-template-columns: 1fr;
+    align-items: start;
+  }
+
+  .timeline-item {
+    grid-template-columns: 1fr;
+    gap: 3px;
+  }
+
   .plant-detail-meta div {
     border-right: 0;
     border-bottom: 1px solid var(--border);

plant-manager/Contracts.cs

@@ -4,12 +4,14 @@ namespace plant_manager
 {
     public record CreatePlantRequest(
         string Nickname,
+        DateOnly? Birthday,
         int? TaxonId,
         int? LocationId,
         IReadOnlyList<SavePlantCareScheduleRequest>? CareSchedules);
 
     public record UpdatePlantRequest(
         string Nickname,
+        DateOnly? Birthday,
         int? TaxonId,
         int? LocationId,
         IReadOnlyList<SavePlantCareScheduleRequest>? CareSchedules);
@@ -51,6 +53,11 @@ namespace plant_manager
         string Name,
         string? Notes);
 
+    public record SavePlantGroupRequest(
+        string Name,
+        IReadOnlyList<int>? PlantIds,
+        string? Notes);
+
     public record SaveCareActionRequest(
         string Name,
         string? Description);
@@ -74,6 +81,20 @@ namespace plant_manager
         string? Unit,
         string? Notes);
 
+    public record SaveRecipeRequest(
+        string Name,
+        string Type,
+        string? MeasurementMode,
+        string? OutputResourceName,
+        IReadOnlyList<SaveRecipeComponentRequest>? Components,
+        string? Notes);
+
+    public record SaveRecipeComponentRequest(
+        int ActionResourceId,
+        decimal? Quantity,
+        string? Unit,
+        string? Notes);
+
     public record CareActivityActionResourceDto(
         int ActionResourceId,
         string Name,
@@ -179,6 +200,39 @@ namespace plant_manager
             new(location.Id, location.Name, location.Notes);
     }
 
+    public record PlantGroupSummaryDto(
+        int Id,
+        string Name)
+    {
+        public static PlantGroupSummaryDto FromMembership(PlantGroupMembership membership) =>
+            new(membership.PlantGroupId, membership.PlantGroup.Name);
+    }
+
+    public record PlantGroupMemberDto(
+        int Id,
+        string Nickname)
+    {
+        public static PlantGroupMemberDto FromMembership(PlantGroupMembership membership) =>
+            new(membership.PlantId, membership.Plant.Nickname);
+    }
+
+    public record PlantGroupDto(
+        int Id,
+        string Name,
+        IReadOnlyList<PlantGroupMemberDto> Plants,
+        string? Notes)
+    {
+        public static PlantGroupDto FromGroup(PlantGroup group) =>
+            new(
+                group.Id,
+                group.Name,
+                group.Memberships
+                    .OrderBy(membership => membership.Plant.Nickname)
+                    .Select(PlantGroupMemberDto.FromMembership)
+                    .ToList(),
+                group.Notes);
+    }
+
     public record CareActionDto(
         int Id,
         string Name,
@@ -191,10 +245,35 @@ namespace plant_manager
     public record ActionResourceDto(
         int Id,
         string Name,
-        string? Notes)
+        string? Notes,
+        RecipeSummaryDto? ProducedByRecipe)
     {
         public static ActionResourceDto FromActionResource(ActionResource resource) =>
-            new(resource.Id, resource.Name, resource.Notes);
+            new(
+                resource.Id,
+                resource.Name,
+                resource.Notes,
+                resource.ProducedByRecipe is null
+                    ? null
+                    : RecipeSummaryDto.FromRecipe(resource.ProducedByRecipe));
+    }
+
+    public record ActionResourceSummaryDto(
+        int Id,
+        string Name)
+    {
+        public static ActionResourceSummaryDto FromActionResource(ActionResource resource) =>
+            new(resource.Id, resource.Name);
+    }
+
+    public record RecipeSummaryDto(
+        int Id,
+        string Name,
+        string Type,
+        string MeasurementMode)
+    {
+        public static RecipeSummaryDto FromRecipe(Recipe recipe) =>
+            new(recipe.Id, recipe.Name, recipe.Type, recipe.MeasurementMode);
     }
 
     public record CareActivityDto(
@@ -218,9 +297,53 @@ namespace plant_manager
                 activity.Notes);
     }
 
+    public record RecipeComponentDto(
+        int ActionResourceId,
+        string Name,
+        decimal? Quantity,
+        string? Unit,
+        string? Notes,
+        int SortOrder)
+    {
+        public static RecipeComponentDto FromRecipeComponent(RecipeComponent component) =>
+            new(
+                component.ActionResourceId,
+                component.ActionResource.Name,
+                component.Quantity,
+                component.Unit,
+                component.Notes,
+                component.SortOrder);
+    }
+
+    public record RecipeDto(
+        int Id,
+        string Name,
+        string Type,
+        string MeasurementMode,
+        ActionResourceSummaryDto? OutputResource,
+        IReadOnlyList<RecipeComponentDto> Components,
+        string? Notes)
+    {
+        public static RecipeDto FromRecipe(Recipe recipe) =>
+            new(
+                recipe.Id,
+                recipe.Name,
+                recipe.Type,
+                recipe.MeasurementMode,
+                recipe.OutputResource is null
+                    ? null
+                    : ActionResourceSummaryDto.FromActionResource(recipe.OutputResource),
+                recipe.Components
+                    .OrderBy(component => component.SortOrder)
+                    .Select(RecipeComponentDto.FromRecipeComponent)
+                    .ToList(),
+                recipe.Notes);
+    }
+
     public record PlantDto(
         int Id,
         string Nickname,
+        DateOnly? Birthday,
         int? TaxonId,
         string Taxon,
         int? LocationId,
@@ -228,6 +351,8 @@ namespace plant_manager
         string NextCare,
         string Status,
         IReadOnlyList<PlantFlagDto> Flags,
+        IReadOnlyList<PlantGroupSummaryDto> Groups,
+        IReadOnlyList<ActionLogDto> ActionLogs,
         IReadOnlyList<PlantCareScheduleDto> CareSchedules)
     {
         public static PlantDto FromPlant(Plant plant)
@@ -256,6 +381,7 @@ namespace plant_manager
             return new PlantDto(
                 plant.Id,
                 plant.Nickname,
+                plant.Birthday,
                 plant.TaxonId,
                 plant.Taxon is null ? "Unassigned" : $"{plant.Taxon.Genus} {plant.Taxon.Species}",
                 plant.LocationId,
@@ -268,6 +394,15 @@ namespace plant_manager
                     .ThenBy(flag => flag.Definition.Name)
                     .Select(PlantFlagDto.FromPlantFlag)
                     .ToList(),
+                plant.GroupMemberships
+                    .OrderBy(membership => membership.PlantGroup.Name)
+                    .Select(PlantGroupSummaryDto.FromMembership)
+                    .ToList(),
+                plant.ActionLogs
+                    .OrderByDescending(log => log.PerformedOn)
+                    .ThenByDescending(log => log.Id)
+                    .Select(ActionLogDto.FromActionLog)
+                    .ToList(),
                 schedules);
         }
 

plant-manager/Data/ApplicationDbContext.cs

@@ -18,6 +18,10 @@ namespace plant_manager.Data
         public DbSet<PlantCareSchedule> PlantCareSchedules { get; set; }
         public DbSet<PlantFlagDefinition> PlantFlagDefinitions { get; set; }
         public DbSet<PlantFlag> PlantFlags { get; set; }
+        public DbSet<Recipe> Recipes { get; set; }
+        public DbSet<RecipeComponent> RecipeComponents { get; set; }
+        public DbSet<PlantGroup> PlantGroups { get; set; }
+        public DbSet<PlantGroupMembership> PlantGroupMemberships { get; set; }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
@@ -40,6 +44,7 @@ namespace plant_manager.Data
             {
                 entity.HasKey(e => e.Id);
                 entity.Property(e => e.Nickname).HasMaxLength(120).IsRequired();
+                entity.Property(e => e.Birthday);
                 entity.HasOne(e => e.Taxon)
                     .WithMany()
                     .HasForeignKey(e => e.TaxonId)
@@ -211,6 +216,64 @@ namespace plant_manager.Data
                     .HasForeignKey(e => e.PlantFlagDefinitionId)
                     .OnDelete(DeleteBehavior.Restrict);
             });
+
+            modelBuilder.Entity<PlantGroup>(entity =>
+            {
+                entity.HasKey(e => e.Id);
+                entity.Property(e => e.Id)
+                      .ValueGeneratedOnAdd();
+                entity.Property(e => e.Name).HasMaxLength(120).IsRequired();
+                entity.Property(e => e.Notes).HasMaxLength(1000);
+                entity.HasIndex(e => e.Name).IsUnique();
+            });
+
+            modelBuilder.Entity<PlantGroupMembership>(entity =>
+            {
+                entity.HasKey(e => new { e.PlantId, e.PlantGroupId });
+                entity.HasOne(e => e.Plant)
+                    .WithMany(e => e.GroupMemberships)
+                    .HasForeignKey(e => e.PlantId)
+                    .OnDelete(DeleteBehavior.Cascade);
+                entity.HasOne(e => e.PlantGroup)
+                    .WithMany(e => e.Memberships)
+                    .HasForeignKey(e => e.PlantGroupId)
+                    .OnDelete(DeleteBehavior.Cascade);
+            });
+
+            modelBuilder.Entity<Recipe>(entity =>
+            {
+                entity.HasKey(e => e.Id);
+                entity.Property(e => e.Id)
+                      .ValueGeneratedOnAdd();
+                entity.Property(e => e.Name).HasMaxLength(120).IsRequired();
+                entity.Property(e => e.Type).HasMaxLength(80).IsRequired();
+                entity.Property(e => e.MeasurementMode).HasMaxLength(40).IsRequired();
+                entity.Property(e => e.Notes).HasMaxLength(1000);
+                entity.HasIndex(e => e.Name).IsUnique();
+                entity.HasIndex(e => e.OutputResourceId).IsUnique();
+                entity.HasOne(e => e.OutputResource)
+                    .WithOne(e => e.ProducedByRecipe)
+                    .HasForeignKey<Recipe>(e => e.OutputResourceId)
+                    .OnDelete(DeleteBehavior.SetNull);
+            });
+
+            modelBuilder.Entity<RecipeComponent>(entity =>
+            {
+                entity.HasKey(e => new { e.RecipeId, e.ActionResourceId });
+                entity.Property(e => e.Quantity).HasPrecision(10, 2);
+                entity.Property(e => e.Unit).HasMaxLength(40);
+                entity.Property(e => e.Notes).HasMaxLength(1000);
+                entity.Property(e => e.SortOrder).IsRequired();
+                entity.HasIndex(e => new { e.RecipeId, e.SortOrder }).IsUnique();
+                entity.HasOne(e => e.Recipe)
+                    .WithMany(e => e.Components)
+                    .HasForeignKey(e => e.RecipeId)
+                    .OnDelete(DeleteBehavior.Cascade);
+                entity.HasOne(e => e.ActionResource)
+                    .WithMany(e => e.RecipeComponents)
+                    .HasForeignKey(e => e.ActionResourceId)
+                    .OnDelete(DeleteBehavior.Restrict);
+            });
         }
     }
 }

plant-manager/Data/Migrations/20260530144239_AddRecipesPlantTimelineAndGroups.Designer.cs

@@ -0,0 +1,789 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using plant_manager.Data;
+
+#nullable disable
+
+namespace plant_manager.Data.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20260530144239_AddRecipesPlantTimelineAndGroups")]
+    partial class AddRecipesPlantTimelineAndGroups
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "10.0.7");
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionLog", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("ActionNameSnapshot")
+                        .IsRequired()
+                        .HasMaxLength(80)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("CareActionId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CareActivityId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateOnly>("PerformedOn")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("PlantId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CareActionId");
+
+                    b.HasIndex("CareActivityId");
+
+                    b.HasIndex("PlantId");
+
+                    b.ToTable("ActionLogs");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionLogResource", b =>
+                {
+                    b.Property<int>("ActionLogId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ActionResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<decimal?>("Quantity")
+                        .HasPrecision(10, 2)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Unit")
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("ActionLogId", "ActionResourceId");
+
+                    b.HasIndex("ActionResourceId");
+
+                    b.ToTable("ActionLogResources");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionResource", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("ActionResources");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareAction", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(400)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(80)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("CareActions");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("CareActivities");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivityAction", b =>
+                {
+                    b.Property<int>("CareActivityId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CareActionId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("SortOrder")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("CareActivityId", "CareActionId");
+
+                    b.HasIndex("CareActionId");
+
+                    b.HasIndex("CareActivityId", "SortOrder")
+                        .IsUnique();
+
+                    b.ToTable("CareActivityActions");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivityActionResource", b =>
+                {
+                    b.Property<int>("CareActivityId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CareActionId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ActionResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal?>("Quantity")
+                        .HasPrecision(10, 2)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Unit")
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("CareActivityId", "CareActionId", "ActionResourceId");
+
+                    b.HasIndex("ActionResourceId");
+
+                    b.ToTable("CareActivityActionResources");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Plant", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateOnly?>("Birthday")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("LocationId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Nickname")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("TaxonId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("LocationId");
+
+                    b.HasIndex("TaxonId");
+
+                    b.ToTable("Plants");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantCareSchedule", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CareActionId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CareActivityId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int?>("EndsAfterOccurrences")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("EndsMode")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateOnly?>("EndsOn")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EveryDays")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PlantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("RecurrenceMode")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("RepeatEvery")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("RepeatOnDays")
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("RepeatUnit")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateOnly?>("ScheduledFor")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CareActionId");
+
+                    b.HasIndex("CareActivityId");
+
+                    b.HasIndex("PlantId", "CareActionId");
+
+                    b.HasIndex("PlantId", "CareActivityId")
+                        .IsUnique();
+
+                    b.ToTable("PlantCareSchedules");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantFlag", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("PlantFlagDefinitionId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PlantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateOnly?>("ResolvedOn")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateOnly>("StartedOn")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PlantFlagDefinitionId");
+
+                    b.HasIndex("PlantId", "PlantFlagDefinitionId", "ResolvedOn");
+
+                    b.ToTable("PlantFlags");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantFlagDefinition", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Color")
+                        .IsRequired()
+                        .HasMaxLength(20)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PlantFlagDefinitions");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroup", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PlantGroups");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroupMembership", b =>
+                {
+                    b.Property<int>("PlantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PlantGroupId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("PlantId", "PlantGroupId");
+
+                    b.HasIndex("PlantGroupId");
+
+                    b.ToTable("PlantGroupMemberships");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantLocation", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PlantLocations");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantTaxon", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Authority")
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Cultivar")
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Genus")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Species")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Variety")
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("PlantTaxa");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("MeasurementMode")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("OutputResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Type")
+                        .IsRequired()
+                        .HasMaxLength(80)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.HasIndex("OutputResourceId")
+                        .IsUnique();
+
+                    b.ToTable("Recipes");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.RecipeComponent", b =>
+                {
+                    b.Property<int>("RecipeId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ActionResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal?>("Quantity")
+                        .HasPrecision(10, 2)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("SortOrder")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Unit")
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("RecipeId", "ActionResourceId");
+
+                    b.HasIndex("ActionResourceId");
+
+                    b.HasIndex("RecipeId", "SortOrder")
+                        .IsUnique();
+
+                    b.ToTable("RecipeComponents");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionLog", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.CareAction", "CareAction")
+                        .WithMany("ActionLogs")
+                        .HasForeignKey("CareActionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.CareActivity", "CareActivity")
+                        .WithMany("ActionLogs")
+                        .HasForeignKey("CareActivityId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Plant", "Plant")
+                        .WithMany("ActionLogs")
+                        .HasForeignKey("PlantId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("CareAction");
+
+                    b.Navigation("CareActivity");
+
+                    b.Navigation("Plant");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionLogResource", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionLog", "ActionLog")
+                        .WithMany("Resources")
+                        .HasForeignKey("ActionLogId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "ActionResource")
+                        .WithMany("ActionLogResources")
+                        .HasForeignKey("ActionResourceId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("ActionLog");
+
+                    b.Navigation("ActionResource");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivityAction", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.CareAction", "CareAction")
+                        .WithMany("CareActivityActions")
+                        .HasForeignKey("CareActionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.CareActivity", "CareActivity")
+                        .WithMany("Actions")
+                        .HasForeignKey("CareActivityId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("CareAction");
+
+                    b.Navigation("CareActivity");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivityActionResource", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "ActionResource")
+                        .WithMany("CareActivityActionResources")
+                        .HasForeignKey("ActionResourceId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.CareActivityAction", "CareActivityAction")
+                        .WithMany("Resources")
+                        .HasForeignKey("CareActivityId", "CareActionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ActionResource");
+
+                    b.Navigation("CareActivityAction");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Plant", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.PlantLocation", "Location")
+                        .WithMany("Plants")
+                        .HasForeignKey("LocationId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.HasOne("plant_manager.Data.Models.PlantTaxon", "Taxon")
+                        .WithMany()
+                        .HasForeignKey("TaxonId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("Location");
+
+                    b.Navigation("Taxon");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantCareSchedule", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.CareAction", "CareAction")
+                        .WithMany("PlantCareSchedules")
+                        .HasForeignKey("CareActionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.CareActivity", "CareActivity")
+                        .WithMany("PlantCareSchedules")
+                        .HasForeignKey("CareActivityId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Plant", "Plant")
+                        .WithMany("CareSchedules")
+                        .HasForeignKey("PlantId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("CareAction");
+
+                    b.Navigation("CareActivity");
+
+                    b.Navigation("Plant");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantFlag", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.PlantFlagDefinition", "Definition")
+                        .WithMany("PlantFlags")
+                        .HasForeignKey("PlantFlagDefinitionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Plant", "Plant")
+                        .WithMany("Flags")
+                        .HasForeignKey("PlantId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Definition");
+
+                    b.Navigation("Plant");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroupMembership", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.PlantGroup", "PlantGroup")
+                        .WithMany("Memberships")
+                        .HasForeignKey("PlantGroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Plant", "Plant")
+                        .WithMany("GroupMemberships")
+                        .HasForeignKey("PlantId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Plant");
+
+                    b.Navigation("PlantGroup");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "OutputResource")
+                        .WithOne("ProducedByRecipe")
+                        .HasForeignKey("plant_manager.Data.Models.Recipe", "OutputResourceId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("OutputResource");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.RecipeComponent", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "ActionResource")
+                        .WithMany("RecipeComponents")
+                        .HasForeignKey("ActionResourceId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Recipe", "Recipe")
+                        .WithMany("Components")
+                        .HasForeignKey("RecipeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ActionResource");
+
+                    b.Navigation("Recipe");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionLog", b =>
+                {
+                    b.Navigation("Resources");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.ActionResource", b =>
+                {
+                    b.Navigation("ActionLogResources");
+
+                    b.Navigation("CareActivityActionResources");
+
+                    b.Navigation("ProducedByRecipe");
+
+                    b.Navigation("RecipeComponents");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareAction", b =>
+                {
+                    b.Navigation("ActionLogs");
+
+                    b.Navigation("CareActivityActions");
+
+                    b.Navigation("PlantCareSchedules");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivity", b =>
+                {
+                    b.Navigation("ActionLogs");
+
+                    b.Navigation("Actions");
+
+                    b.Navigation("PlantCareSchedules");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.CareActivityAction", b =>
+                {
+                    b.Navigation("Resources");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Plant", b =>
+                {
+                    b.Navigation("ActionLogs");
+
+                    b.Navigation("CareSchedules");
+
+                    b.Navigation("Flags");
+
+                    b.Navigation("GroupMemberships");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantFlagDefinition", b =>
+                {
+                    b.Navigation("PlantFlags");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroup", b =>
+                {
+                    b.Navigation("Memberships");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantLocation", b =>
+                {
+                    b.Navigation("Plants");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.Navigation("Components");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

plant-manager/Data/Migrations/20260530144239_AddRecipesPlantTimelineAndGroups.cs

@@ -0,0 +1,164 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace plant_manager.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddRecipesPlantTimelineAndGroups : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateOnly>(
+                name: "Birthday",
+                table: "Plants",
+                type: "TEXT",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "PlantGroups",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Name = table.Column<string>(type: "TEXT", maxLength: 120, nullable: false),
+                    Notes = table.Column<string>(type: "TEXT", maxLength: 1000, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_PlantGroups", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Recipes",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Name = table.Column<string>(type: "TEXT", maxLength: 120, nullable: false),
+                    Type = table.Column<string>(type: "TEXT", maxLength: 80, nullable: false),
+                    MeasurementMode = table.Column<string>(type: "TEXT", maxLength: 40, nullable: false),
+                    OutputResourceId = table.Column<int>(type: "INTEGER", nullable: true),
+                    Notes = table.Column<string>(type: "TEXT", maxLength: 1000, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Recipes", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Recipes_ActionResources_OutputResourceId",
+                        column: x => x.OutputResourceId,
+                        principalTable: "ActionResources",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "PlantGroupMemberships",
+                columns: table => new
+                {
+                    PlantId = table.Column<int>(type: "INTEGER", nullable: false),
+                    PlantGroupId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_PlantGroupMemberships", x => new { x.PlantId, x.PlantGroupId });
+                    table.ForeignKey(
+                        name: "FK_PlantGroupMemberships_PlantGroups_PlantGroupId",
+                        column: x => x.PlantGroupId,
+                        principalTable: "PlantGroups",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_PlantGroupMemberships_Plants_PlantId",
+                        column: x => x.PlantId,
+                        principalTable: "Plants",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "RecipeComponents",
+                columns: table => new
+                {
+                    RecipeId = table.Column<int>(type: "INTEGER", nullable: false),
+                    ActionResourceId = table.Column<int>(type: "INTEGER", nullable: false),
+                    Quantity = table.Column<decimal>(type: "TEXT", precision: 10, scale: 2, nullable: true),
+                    Unit = table.Column<string>(type: "TEXT", maxLength: 40, nullable: true),
+                    Notes = table.Column<string>(type: "TEXT", maxLength: 1000, nullable: true),
+                    SortOrder = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_RecipeComponents", x => new { x.RecipeId, x.ActionResourceId });
+                    table.ForeignKey(
+                        name: "FK_RecipeComponents_ActionResources_ActionResourceId",
+                        column: x => x.ActionResourceId,
+                        principalTable: "ActionResources",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_RecipeComponents_Recipes_RecipeId",
+                        column: x => x.RecipeId,
+                        principalTable: "Recipes",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PlantGroupMemberships_PlantGroupId",
+                table: "PlantGroupMemberships",
+                column: "PlantGroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PlantGroups_Name",
+                table: "PlantGroups",
+                column: "Name",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_RecipeComponents_ActionResourceId",
+                table: "RecipeComponents",
+                column: "ActionResourceId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_RecipeComponents_RecipeId_SortOrder",
+                table: "RecipeComponents",
+                columns: new[] { "RecipeId", "SortOrder" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Recipes_Name",
+                table: "Recipes",
+                column: "Name",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Recipes_OutputResourceId",
+                table: "Recipes",
+                column: "OutputResourceId",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "PlantGroupMemberships");
+
+            migrationBuilder.DropTable(
+                name: "RecipeComponents");
+
+            migrationBuilder.DropTable(
+                name: "PlantGroups");
+
+            migrationBuilder.DropTable(
+                name: "Recipes");
+
+            migrationBuilder.DropColumn(
+                name: "Birthday",
+                table: "Plants");
+        }
+    }
+}

plant-manager/Data/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -83,6 +83,7 @@ namespace plant_manager.Data.Migrations
                     b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("INTEGER");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(120)
@@ -109,6 +110,7 @@ namespace plant_manager.Data.Migrations
                     b.Property<string>("Description")
                         .HasMaxLength(400)
                         .HasColumnType("TEXT");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(80)
@@ -127,6 +129,7 @@ namespace plant_manager.Data.Migrations
                     b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("INTEGER");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(120)
@@ -201,6 +204,9 @@ namespace plant_manager.Data.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("INTEGER");
 
+                    b.Property<DateOnly?>("Birthday")
+                        .HasColumnType("TEXT");
+
                     b.Property<int?>("LocationId")
                         .HasColumnType("INTEGER");
 
@@ -246,6 +252,7 @@ namespace plant_manager.Data.Migrations
 
                     b.Property<int>("EveryDays")
                         .HasColumnType("INTEGER");
+
                     b.Property<int>("PlantId")
                         .HasColumnType("INTEGER");
 
@@ -324,6 +331,7 @@ namespace plant_manager.Data.Migrations
                         .IsRequired()
                         .HasMaxLength(20)
                         .HasColumnType("TEXT");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(120)
@@ -337,11 +345,50 @@ namespace plant_manager.Data.Migrations
                     b.ToTable("PlantFlagDefinitions");
                 });
 
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroup", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PlantGroups");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroupMembership", b =>
+                {
+                    b.Property<int>("PlantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PlantGroupId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("PlantId", "PlantGroupId");
+
+                    b.HasIndex("PlantGroupId");
+
+                    b.ToTable("PlantGroupMemberships");
+                });
+
             modelBuilder.Entity("plant_manager.Data.Models.PlantLocation", b =>
                 {
                     b.Property<int>("Id")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("INTEGER");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(120)
@@ -397,6 +444,78 @@ namespace plant_manager.Data.Migrations
                     b.ToTable("PlantTaxa");
                 });
 
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("MeasurementMode")
+                        .IsRequired()
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("OutputResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Type")
+                        .IsRequired()
+                        .HasMaxLength(80)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.HasIndex("OutputResourceId")
+                        .IsUnique();
+
+                    b.ToTable("Recipes");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.RecipeComponent", b =>
+                {
+                    b.Property<int>("RecipeId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ActionResourceId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(1000)
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal?>("Quantity")
+                        .HasPrecision(10, 2)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("SortOrder")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Unit")
+                        .HasMaxLength(40)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("RecipeId", "ActionResourceId");
+
+                    b.HasIndex("ActionResourceId");
+
+                    b.HasIndex("RecipeId", "SortOrder")
+                        .IsUnique();
+
+                    b.ToTable("RecipeComponents");
+                });
+
             modelBuilder.Entity("plant_manager.Data.Models.ActionLog", b =>
                 {
                     b.HasOne("plant_manager.Data.Models.CareAction", "CareAction")
@@ -544,6 +663,54 @@ namespace plant_manager.Data.Migrations
                     b.Navigation("Plant");
                 });
 
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroupMembership", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.PlantGroup", "PlantGroup")
+                        .WithMany("Memberships")
+                        .HasForeignKey("PlantGroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Plant", "Plant")
+                        .WithMany("GroupMemberships")
+                        .HasForeignKey("PlantId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Plant");
+
+                    b.Navigation("PlantGroup");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "OutputResource")
+                        .WithOne("ProducedByRecipe")
+                        .HasForeignKey("plant_manager.Data.Models.Recipe", "OutputResourceId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("OutputResource");
+                });
+
+            modelBuilder.Entity("plant_manager.Data.Models.RecipeComponent", b =>
+                {
+                    b.HasOne("plant_manager.Data.Models.ActionResource", "ActionResource")
+                        .WithMany("RecipeComponents")
+                        .HasForeignKey("ActionResourceId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("plant_manager.Data.Models.Recipe", "Recipe")
+                        .WithMany("Components")
+                        .HasForeignKey("RecipeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ActionResource");
+
+                    b.Navigation("Recipe");
+                });
+
             modelBuilder.Entity("plant_manager.Data.Models.ActionLog", b =>
                 {
                     b.Navigation("Resources");
@@ -554,6 +721,10 @@ namespace plant_manager.Data.Migrations
                     b.Navigation("ActionLogResources");
 
                     b.Navigation("CareActivityActionResources");
+
+                    b.Navigation("ProducedByRecipe");
+
+                    b.Navigation("RecipeComponents");
                 });
 
             modelBuilder.Entity("plant_manager.Data.Models.CareAction", b =>
@@ -586,6 +757,8 @@ namespace plant_manager.Data.Migrations
                     b.Navigation("CareSchedules");
 
                     b.Navigation("Flags");
+
+                    b.Navigation("GroupMemberships");
                 });
 
             modelBuilder.Entity("plant_manager.Data.Models.PlantFlagDefinition", b =>
@@ -593,10 +766,20 @@ namespace plant_manager.Data.Migrations
                     b.Navigation("PlantFlags");
                 });
 
+            modelBuilder.Entity("plant_manager.Data.Models.PlantGroup", b =>
+                {
+                    b.Navigation("Memberships");
+                });
+
             modelBuilder.Entity("plant_manager.Data.Models.PlantLocation", b =>
                 {
                     b.Navigation("Plants");
                 });
+
+            modelBuilder.Entity("plant_manager.Data.Models.Recipe", b =>
+                {
+                    b.Navigation("Components");
+                });
 #pragma warning restore 612, 618
         }
     }

plant-manager/Data/Models/ActionResource.cs

@@ -9,5 +9,7 @@ namespace plant_manager.Data.Models
 
         public List<CareActivityActionResource> CareActivityActionResources { get; set; } = [];
         public List<ActionLogResource> ActionLogResources { get; set; } = [];
+        public List<RecipeComponent> RecipeComponents { get; set; } = [];
+        public Recipe? ProducedByRecipe { get; set; }
     }
 }

plant-manager/Data/Models/Plant.cs

@@ -6,11 +6,13 @@ namespace plant_manager.Data.Models
         public int? TaxonId { get; set; }
         public int? LocationId { get; set; }
         public string Nickname { get; set; } = string.Empty;
+        public DateOnly? Birthday { get; set; }
 
         public PlantTaxon? Taxon { get; set; }
         public PlantLocation? Location { get; set; }
         public List<ActionLog> ActionLogs { get; set; } = [];
         public List<PlantCareSchedule> CareSchedules { get; set; } = [];
         public List<PlantFlag> Flags { get; set; } = [];
+        public List<PlantGroupMembership> GroupMemberships { get; set; } = [];
     }
 }

plant-manager/Data/Models/PlantGroup.cs

@@ -0,0 +1,12 @@
+namespace plant_manager.Data.Models
+{
+    public class PlantGroup
+    {
+        public int Id { get; set; }
+
+        public string Name { get; set; } = string.Empty;
+        public string? Notes { get; set; }
+
+        public List<PlantGroupMembership> Memberships { get; set; } = [];
+    }
+}

plant-manager/Data/Models/PlantGroupMembership.cs

@@ -0,0 +1,11 @@
+namespace plant_manager.Data.Models
+{
+    public class PlantGroupMembership
+    {
+        public int PlantId { get; set; }
+        public int PlantGroupId { get; set; }
+
+        public Plant Plant { get; set; } = null!;
+        public PlantGroup PlantGroup { get; set; } = null!;
+    }
+}

plant-manager/Data/Models/Recipe.cs

@@ -0,0 +1,16 @@
+namespace plant_manager.Data.Models
+{
+    public class Recipe
+    {
+        public int Id { get; set; }
+
+        public string Name { get; set; } = string.Empty;
+        public string Type { get; set; } = string.Empty;
+        public string MeasurementMode { get; set; } = "quantity";
+        public int? OutputResourceId { get; set; }
+        public string? Notes { get; set; }
+
+        public ActionResource? OutputResource { get; set; }
+        public List<RecipeComponent> Components { get; set; } = [];
+    }
+}

plant-manager/Data/Models/RecipeComponent.cs

@@ -0,0 +1,15 @@
+namespace plant_manager.Data.Models
+{
+    public class RecipeComponent
+    {
+        public int RecipeId { get; set; }
+        public int ActionResourceId { get; set; }
+        public decimal? Quantity { get; set; }
+        public string? Unit { get; set; }
+        public string? Notes { get; set; }
+        public int SortOrder { get; set; }
+
+        public Recipe Recipe { get; set; } = null!;
+        public ActionResource ActionResource { get; set; } = null!;
+    }
+}

plant-manager/Endpoints/ActionResourceEndpoints.cs

@@ -11,6 +11,7 @@ namespace plant_manager.Endpoints
             app.MapGet("/api/action-resources", async (ApplicationDbContext db) =>
             {
                 var resources = await db.ActionResources
+                    .Include(resource => resource.ProducedByRecipe)
                     .OrderBy(resource => resource.Name)
                     .Select(resource => ActionResourceDto.FromActionResource(resource))
                     .ToListAsync();
@@ -82,7 +83,8 @@ namespace plant_manager.Endpoints
                 }
 
                 var isInUse = await db.ActionLogResources.AnyAsync(logResource => logResource.ActionResourceId == id)
-                    || await db.CareActivityActionResources.AnyAsync(activityResource => activityResource.ActionResourceId == id);
+                    || await db.CareActivityActionResources.AnyAsync(activityResource => activityResource.ActionResourceId == id)
+                    || await db.RecipeComponents.AnyAsync(component => component.ActionResourceId == id);
                 if (isInUse)
                 {
                     return Results.Conflict(new { error = "Resource is in use." });

plant-manager/Endpoints/PlantEndpoints.cs

@@ -25,8 +25,12 @@ namespace plant_manager.Endpoints
                     .ThenInclude(action => action.Resources)
                     .ThenInclude(resource => resource.ActionResource)
                     .Include(plant => plant.ActionLogs)
+                    .ThenInclude(log => log.Resources)
+                    .ThenInclude(resource => resource.ActionResource)
                     .Include(plant => plant.Flags)
                     .ThenInclude(flag => flag.Definition)
+                    .Include(plant => plant.GroupMemberships)
+                    .ThenInclude(membership => membership.PlantGroup)
                     .OrderBy(plant => plant.Nickname)
                     .ToListAsync();
 
@@ -50,8 +54,12 @@ namespace plant_manager.Endpoints
                     .ThenInclude(action => action.Resources)
                     .ThenInclude(resource => resource.ActionResource)
                     .Include(plant => plant.ActionLogs)
+                    .ThenInclude(log => log.Resources)
+                    .ThenInclude(resource => resource.ActionResource)
                     .Include(plant => plant.Flags)
                     .ThenInclude(flag => flag.Definition)
+                    .Include(plant => plant.GroupMemberships)
+                    .ThenInclude(membership => membership.PlantGroup)
                     .FirstOrDefaultAsync(item => item.Id == id);
 
                 return plant is null
@@ -81,6 +89,7 @@ namespace plant_manager.Endpoints
                 var plant = new Plant
                 {
                     Nickname = request.Nickname.Trim(),
+                    Birthday = request.Birthday,
                     TaxonId = request.TaxonId,
                     LocationId = request.LocationId
                 };
@@ -125,8 +134,12 @@ namespace plant_manager.Endpoints
                     .ThenInclude(action => action.Resources)
                     .ThenInclude(resource => resource.ActionResource)
                     .Include(item => item.ActionLogs)
+                    .ThenInclude(log => log.Resources)
+                    .ThenInclude(resource => resource.ActionResource)
                     .Include(item => item.Flags)
                     .ThenInclude(flag => flag.Definition)
+                    .Include(item => item.GroupMemberships)
+                    .ThenInclude(membership => membership.PlantGroup)
                     .FirstOrDefaultAsync(item => item.Id == id);
 
                 if (plant is null)
@@ -147,6 +160,7 @@ namespace plant_manager.Endpoints
                 }
 
                 plant.Nickname = request.Nickname.Trim();
+                plant.Birthday = request.Birthday;
                 plant.TaxonId = request.TaxonId;
                 plant.LocationId = request.LocationId;
                 plant.Taxon = taxon;

plant-manager/Endpoints/PlantGroupEndpoints.cs

@@ -0,0 +1,147 @@
+using Microsoft.EntityFrameworkCore;
+using plant_manager.Data;
+using plant_manager.Data.Models;
+
+namespace plant_manager.Endpoints
+{
+    public static class PlantGroupEndpoints
+    {
+        public static void MapPlantGroupEndpoints(this WebApplication app)
+        {
+            app.MapGet("/api/plant-groups", async (ApplicationDbContext db) =>
+            {
+                var groups = await db.PlantGroups
+                    .Include(group => group.Memberships)
+                    .ThenInclude(membership => membership.Plant)
+                    .OrderBy(group => group.Name)
+                    .Select(group => PlantGroupDto.FromGroup(group))
+                    .ToListAsync();
+
+                return Results.Ok(groups);
+            });
+
+            app.MapPost("/api/plant-groups", async (SavePlantGroupRequest request, ApplicationDbContext db) =>
+            {
+                var validation = await ValidateRequest(request, db);
+                if (validation.Error is not null)
+                {
+                    return Results.BadRequest(new { error = validation.Error });
+                }
+
+                var name = request.Name.Trim();
+                var exists = await db.PlantGroups.AnyAsync(group => group.Name.ToLower() == name.ToLower());
+                if (exists)
+                {
+                    return Results.Conflict(new { error = "A plant group with this name already exists." });
+                }
+
+                var group = new PlantGroup
+                {
+                    Name = name,
+                    Notes = string.IsNullOrWhiteSpace(request.Notes) ? null : request.Notes.Trim(),
+                    Memberships = validation.PlantIds
+                        .Select(plantId => new PlantGroupMembership { PlantId = plantId })
+                        .ToList()
+                };
+
+                db.PlantGroups.Add(group);
+                await db.SaveChangesAsync();
+
+                await db.Entry(group)
+                    .Collection(item => item.Memberships)
+                    .Query()
+                    .Include(membership => membership.Plant)
+                    .LoadAsync();
+
+                return Results.Created($"/api/plant-groups/{group.Id}", PlantGroupDto.FromGroup(group));
+            });
+
+            app.MapPut("/api/plant-groups/{id:int}", async (int id, SavePlantGroupRequest request, ApplicationDbContext db) =>
+            {
+                var group = await db.PlantGroups
+                    .Include(item => item.Memberships)
+                    .ThenInclude(membership => membership.Plant)
+                    .FirstOrDefaultAsync(item => item.Id == id);
+                if (group is null)
+                {
+                    return Results.NotFound();
+                }
+
+                var validation = await ValidateRequest(request, db);
+                if (validation.Error is not null)
+                {
+                    return Results.BadRequest(new { error = validation.Error });
+                }
+
+                var name = request.Name.Trim();
+                var exists = await db.PlantGroups.AnyAsync(item =>
+                    item.Id != id && item.Name.ToLower() == name.ToLower());
+                if (exists)
+                {
+                    return Results.Conflict(new { error = "A plant group with this name already exists." });
+                }
+
+                group.Name = name;
+                group.Notes = string.IsNullOrWhiteSpace(request.Notes) ? null : request.Notes.Trim();
+                db.PlantGroupMemberships.RemoveRange(group.Memberships);
+                group.Memberships = validation.PlantIds
+                    .Select(plantId => new PlantGroupMembership
+                    {
+                        PlantGroupId = group.Id,
+                        PlantId = plantId
+                    })
+                    .ToList();
+
+                await db.SaveChangesAsync();
+
+                await db.Entry(group)
+                    .Collection(item => item.Memberships)
+                    .Query()
+                    .Include(membership => membership.Plant)
+                    .LoadAsync();
+
+                return Results.Ok(PlantGroupDto.FromGroup(group));
+            });
+
+            app.MapDelete("/api/plant-groups/{id:int}", async (int id, ApplicationDbContext db) =>
+            {
+                var group = await db.PlantGroups.FindAsync(id);
+                if (group is null)
+                {
+                    return Results.NotFound();
+                }
+
+                db.PlantGroups.Remove(group);
+                await db.SaveChangesAsync();
+
+                return Results.NoContent();
+            });
+        }
+
+        private static async Task<(List<int> PlantIds, string? Error)> ValidateRequest(
+            SavePlantGroupRequest request,
+            ApplicationDbContext db)
+        {
+            if (string.IsNullOrWhiteSpace(request.Name))
+            {
+                return ([], "Group name is required.");
+            }
+
+            var plantIds = request.PlantIds?
+                .Where(id => id > 0)
+                .Distinct()
+                .ToList() ?? [];
+
+            if (plantIds.Count > 0)
+            {
+                var existingPlantCount = await db.Plants.CountAsync(plant => plantIds.Contains(plant.Id));
+                if (existingPlantCount != plantIds.Count)
+                {
+                    return ([], "One or more plants were not found.");
+                }
+            }
+
+            return (plantIds, null);
+        }
+    }
+}

plant-manager/Endpoints/RecipeEndpoints.cs

@@ -0,0 +1,250 @@
+using Microsoft.EntityFrameworkCore;
+using plant_manager.Data;
+using plant_manager.Data.Models;
+
+namespace plant_manager.Endpoints
+{
+    public static class RecipeEndpoints
+    {
+        public static void MapRecipeEndpoints(this WebApplication app)
+        {
+            app.MapGet("/api/recipes", async (ApplicationDbContext db) =>
+            {
+                var recipes = await db.Recipes
+                    .Include(recipe => recipe.OutputResource)
+                    .Include(recipe => recipe.Components)
+                    .ThenInclude(component => component.ActionResource)
+                    .OrderBy(recipe => recipe.Name)
+                    .Select(recipe => RecipeDto.FromRecipe(recipe))
+                    .ToListAsync();
+
+                return Results.Ok(recipes);
+            });
+
+            app.MapPost("/api/recipes", async (SaveRecipeRequest request, ApplicationDbContext db) =>
+            {
+                var validation = await ValidateRequest(request, db);
+                if (validation.Error is not null)
+                {
+                    return Results.BadRequest(new { error = validation.Error });
+                }
+
+                var name = request.Name.Trim();
+                var exists = await db.Recipes.AnyAsync(recipe => recipe.Name.ToLower() == name.ToLower());
+                if (exists)
+                {
+                    return Results.Conflict(new { error = "A recipe with this name already exists." });
+                }
+
+                var recipe = new Recipe
+                {
+                    Name = name,
+                    Type = request.Type.Trim(),
+                    MeasurementMode = validation.MeasurementMode,
+                    OutputResource = validation.OutputResourceName is null
+                        ? null
+                        : new ActionResource
+                        {
+                            Name = validation.OutputResourceName
+                        },
+                    Notes = string.IsNullOrWhiteSpace(request.Notes) ? null : request.Notes.Trim(),
+                    Components = validation.Components
+                };
+
+                db.Recipes.Add(recipe);
+                await db.SaveChangesAsync();
+
+                return Results.Created($"/api/recipes/{recipe.Id}", RecipeDto.FromRecipe(recipe));
+            });
+
+            app.MapPut("/api/recipes/{id:int}", async (int id, SaveRecipeRequest request, ApplicationDbContext db) =>
+            {
+                var recipe = await db.Recipes
+                    .Include(item => item.OutputResource)
+                    .Include(item => item.Components)
+                    .ThenInclude(component => component.ActionResource)
+                    .FirstOrDefaultAsync(item => item.Id == id);
+                if (recipe is null)
+                {
+                    return Results.NotFound();
+                }
+
+                var validation = await ValidateRequest(request, db, recipe.OutputResourceId);
+                if (validation.Error is not null)
+                {
+                    return Results.BadRequest(new { error = validation.Error });
+                }
+
+                var name = request.Name.Trim();
+                var exists = await db.Recipes.AnyAsync(item =>
+                    item.Id != id && item.Name.ToLower() == name.ToLower());
+                if (exists)
+                {
+                    return Results.Conflict(new { error = "A recipe with this name already exists." });
+                }
+
+                recipe.Name = name;
+                recipe.Type = request.Type.Trim();
+                recipe.MeasurementMode = validation.MeasurementMode;
+                if (validation.OutputResourceName is null)
+                {
+                    recipe.OutputResourceId = null;
+                    recipe.OutputResource = null;
+                }
+                else if (recipe.OutputResource is null)
+                {
+                    recipe.OutputResource = new ActionResource
+                    {
+                        Name = validation.OutputResourceName
+                    };
+                }
+                else
+                {
+                    recipe.OutputResource.Name = validation.OutputResourceName;
+                }
+                recipe.Notes = string.IsNullOrWhiteSpace(request.Notes) ? null : request.Notes.Trim();
+                db.RecipeComponents.RemoveRange(recipe.Components);
+                recipe.Components = validation.Components;
+
+                await db.SaveChangesAsync();
+
+                return Results.Ok(RecipeDto.FromRecipe(recipe));
+            });
+
+            app.MapDelete("/api/recipes/{id:int}", async (int id, ApplicationDbContext db) =>
+            {
+                var recipe = await db.Recipes.FindAsync(id);
+                if (recipe is null)
+                {
+                    return Results.NotFound();
+                }
+
+                db.Recipes.Remove(recipe);
+                await db.SaveChangesAsync();
+
+                return Results.NoContent();
+            });
+        }
+
+        private static async Task<(List<RecipeComponent> Components, string MeasurementMode, string? OutputResourceName, string? Error)> ValidateRequest(
+            SaveRecipeRequest request,
+            ApplicationDbContext db,
+            int? currentOutputResourceId = null)
+        {
+            if (string.IsNullOrWhiteSpace(request.Name))
+            {
+                return ([], "quantity", null, "Recipe name is required.");
+            }
+
+            if (string.IsNullOrWhiteSpace(request.Type))
+            {
+                return ([], "quantity", null, "Recipe type is required.");
+            }
+
+            var measurementMode = NormalizeMeasurementMode(request.MeasurementMode);
+            if (measurementMode is null)
+            {
+                return ([], "quantity", null, "Recipe measurement mode is invalid.");
+            }
+
+            var outputResourceName = string.IsNullOrWhiteSpace(request.OutputResourceName)
+                ? null
+                : request.OutputResourceName.Trim();
+            if (outputResourceName is null)
+            {
+                return ([], measurementMode, null, "Produced resource name is required.");
+            }
+
+            if (outputResourceName is not null)
+            {
+                var outputNameExists = await db.ActionResources.AnyAsync(resource =>
+                    resource.Name.ToLower() == outputResourceName.ToLower()
+                    && (currentOutputResourceId == null || resource.Id != currentOutputResourceId));
+                if (outputNameExists)
+                {
+                    return ([], measurementMode, null, "A resource with this output name already exists.");
+                }
+            }
+
+            var requestedComponents = request.Components?
+                .GroupBy(component => component.ActionResourceId)
+                .Select(group => group.First())
+                .ToList();
+            if (requestedComponents is null || requestedComponents.Count == 0)
+            {
+                return ([], measurementMode, outputResourceName, "Select at least one recipe component.");
+            }
+
+            if (requestedComponents.Any(component => component.ActionResourceId <= 0))
+            {
+                return ([], measurementMode, outputResourceName, "Select a resource for every recipe component.");
+            }
+
+            if (requestedComponents.Any(component => component.Quantity < 0))
+            {
+                return ([], measurementMode, outputResourceName, "Component quantities cannot be negative.");
+            }
+
+            if (measurementMode is "total_percent" or "bakers_percent"
+                && requestedComponents.Any(component => component.Quantity is null))
+            {
+                return ([], measurementMode, outputResourceName, "Percent recipes require a value for every component.");
+            }
+
+            if (measurementMode == "total_percent"
+                && requestedComponents.Sum(component => component.Quantity ?? 0) != 100)
+            {
+                return ([], measurementMode, outputResourceName, "Total percent recipes must add up to 100%.");
+            }
+
+            if (measurementMode == "bakers_percent"
+                && !requestedComponents.Any(component => component.Quantity == 100))
+            {
+                return ([], measurementMode, outputResourceName, "Baker's percent recipes need one base component at 100%.");
+            }
+
+            var resourceIds = requestedComponents
+                .Select(component => component.ActionResourceId)
+                .ToList();
+            var resourcesById = await db.ActionResources
+                .Where(resource => resourceIds.Contains(resource.Id))
+                .ToDictionaryAsync(resource => resource.Id);
+            if (resourcesById.Count != resourceIds.Count)
+            {
+                return ([], measurementMode, outputResourceName, "One or more resources were not found.");
+            }
+
+            var components = requestedComponents
+                .Select((componentRequest, index) => new RecipeComponent
+                {
+                    ActionResourceId = componentRequest.ActionResourceId,
+                    ActionResource = resourcesById[componentRequest.ActionResourceId],
+                    Quantity = componentRequest.Quantity,
+                    Unit = measurementMode == "quantity"
+                        ? string.IsNullOrWhiteSpace(componentRequest.Unit) ? null : componentRequest.Unit.Trim()
+                        : "%",
+                    Notes = string.IsNullOrWhiteSpace(componentRequest.Notes) ? null : componentRequest.Notes.Trim(),
+                    SortOrder = index
+                })
+                .ToList();
+
+            return (components, measurementMode, outputResourceName, null);
+        }
+
+        private static string? NormalizeMeasurementMode(string? value)
+        {
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return "quantity";
+            }
+
+            return value.Trim().ToLowerInvariant() switch
+            {
+                "quantity" => "quantity",
+                "total_percent" => "total_percent",
+                "bakers_percent" => "bakers_percent",
+                _ => null
+            };
+        }
+    }
+}

plant-manager/Program.cs

@@ -43,9 +43,11 @@ app.MapRootEndpoints();
 app.MapPlantEndpoints();
 app.MapPlantTaxonEndpoints();
 app.MapPlantLocationEndpoints();
+app.MapPlantGroupEndpoints();
 app.MapCareActionEndpoints();
 app.MapActionResourceEndpoints();
 app.MapCareActivityEndpoints();
+app.MapRecipeEndpoints();
 app.MapPlantCareScheduleEndpoints();
 app.MapCareTaskEndpoints();
 app.MapActionLogEndpoints();