diff --git a/internal/agent/tools_test.go b/internal/agent/tools_test.go
index 576ea97..f116377 100644
--- a/internal/agent/tools_test.go
+++ b/internal/agent/tools_test.go
@@ -25,21 +25,8 @@ import (
 // Build/run with: go test -tags majordomo ./internal/agent/
 func TestToolboxScenario(t *testing.T) {
 	ctx := context.Background()
-	db, err := store.Open(":memory:")
-	if err != nil {
-		t.Fatalf("open: %v", err)
-	}
-	t.Cleanup(func() { db.Close() })
-	if err := db.Migrate(ctx); err != nil {
-		t.Fatalf("migrate: %v", err)
-	}
-	svc := service.New(db, &config.Config{Registration: config.RegistrationOpen, LocalAuth: true})
-
-	owner, err := svc.Register(ctx, service.RegisterInput{Email: "a@example.com", DisplayName: "A", Password: "password123"})
-	if err != nil {
-		t.Fatalf("register: %v", err)
-	}
-	box := NewToolbox(svc, owner.ID)
+	svc, ownerID := newAgentTestService(t)
+	box := NewToolbox(svc, ownerID)
 
 	call := func(name string, args any) llm.ToolResult {
 		t.Helper()
@@ -49,13 +36,13 @@ func TestToolboxScenario(t *testing.T) {
 
 	// Garden + plants are set up directly (there are no create_garden/plant tools);
 	// the agent-facing bits — object + fills + describe — go through the toolbox.
-	g, err := svc.CreateGarden(ctx, owner.ID, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000})
+	g, err := svc.CreateGarden(ctx, ownerID, service.GardenInput{Name: "Plot", WidthCM: 2000, HeightCM: 2000})
 	if err != nil {
 		t.Fatalf("garden: %v", err)
 	}
-	garlic := mustPlant(t, svc, owner.ID, "Garlic", 15, "🧄")
-	basil := mustPlant(t, svc, owner.ID, "Basil", 25, "🌿")
-	beans := mustPlant(t, svc, owner.ID, "Beans", 10, "🫘")
+	garlic := mustPlant(t, svc, ownerID, "Garlic", 15, "🧄")
+	basil := mustPlant(t, svc, ownerID, "Basil", 25, "🌿")
+	beans := mustPlant(t, svc, ownerID, "Beans", 10, "🫘")
 
 	// create_object → a 400×400 bed.
 	res := call("create_object", map[string]any{
@@ -120,7 +107,7 @@ func TestToolboxScenario(t *testing.T) {
 	if err != nil {
 		t.Fatalf("register viewer: %v", err)
 	}
-	if _, err := svc.AddShare(ctx, owner.ID, g.ID, "v@example.com", domain.RoleViewer); err != nil {
+	if _, err := svc.AddShare(ctx, ownerID, g.ID, "v@example.com", domain.RoleViewer); err != nil {
 		t.Fatalf("share: %v", err)
 	}
 	viewerBox := NewToolbox(svc, viewerUser.ID)
diff --git a/internal/service/plants.go b/internal/service/plants.go
index 273b2a3..2f2214d 100644
--- a/internal/service/plants.go
+++ b/internal/service/plants.go
@@ -76,10 +76,14 @@ func (s *Service) ListPlants(ctx context.Context, actorID int64) ([]domain.Plant
 type PlantMatch struct {
 	domain.Plant
 	// SeedRemaining is the total left across the actor's lots of this plant, and
-	// SeedUnit the unit they're counted in — omitted when there are no lots, or
-	// when lots disagree about the unit and summing them would be a lie.
+	// SeedUnit the unit they're counted in. Both are omitted when there are no
+	// lots — and also when the lots disagree about the unit, because adding
+	// grams to packets produces a number that means nothing. SeedLots still
+	// reports how many there are, so "several lots, no single total" is
+	// distinguishable from "no seed at all".
 	SeedRemaining *float64 `json:"seedRemaining,omitempty"`
 	SeedUnit      string   `json:"seedUnit,omitempty"`
+	SeedLots      int      `json:"seedLots,omitempty"`
 }
 
 // maxPlantMatches caps FindPlants. A model given fifty candidates is not being
@@ -162,14 +166,22 @@ func (s *Service) attachSeedRemaining(ctx context.Context, actorID int64, matche
 		if len(ls) == 0 {
 			continue
 		}
-		total := 0.0
+		matches[i].SeedLots = len(ls)
 		unit := ls[0].Unit
+		mixed := false
+		total := 0.0
 		for _, l := range ls {
 			total += l.Remaining
 			if l.Unit != unit {
-				unit = "" // mixed units can't be summed honestly
+				mixed = true
 			}
 		}
+		if mixed {
+			// Dropping only the LABEL would leave a number that reads as a
+			// quantity and isn't one. Drop the total with it; SeedLots still says
+			// there is seed here, just not one figure for it.
+			continue
+		}
 		matches[i].SeedRemaining = &total
 		matches[i].SeedUnit = unit
 	}
diff --git a/internal/service/plants_test.go b/internal/service/plants_test.go
index f3de124..9394691 100644
--- a/internal/service/plants_test.go
+++ b/internal/service/plants_test.go
@@ -338,3 +338,37 @@ func TestFindPlantsReportsSeedRemaining(t *testing.T) {
 		}
 	}
 }
+
+// TestFindPlantsOmitsATotalItCannotHonestlyGive — lots in different units can't
+// be summed. Dropping only the unit LABEL would leave a number that reads as a
+// quantity and isn't one; the count of lots still says there is seed here.
+func TestFindPlantsOmitsATotalItCannotHonestlyGive(t *testing.T) {
+	s := newTestService(t, openConfig())
+	owner := seedUser(t, s, "a@example.com")
+	plant := seedOwnPlant(t, s, owner, 15)
+	ctx := context.Background()
+
+	for _, u := range []string{domain.UnitSeeds, domain.UnitGrams} {
+		if _, err := s.CreateSeedLot(ctx, owner, SeedLotInput{PlantID: plant.ID, Quantity: 50, Unit: u}); err != nil {
+			t.Fatalf("CreateSeedLot(%s): %v", u, err)
+		}
+	}
+
+	got, err := s.FindPlants(ctx, owner, plant.Name)
+	if err != nil {
+		t.Fatalf("FindPlants: %v", err)
+	}
+	if len(got) == 0 {
+		t.Fatal("plant not found")
+	}
+	if got[0].SeedRemaining != nil {
+		t.Errorf("reported %v across mismatched units; that number means nothing", *got[0].SeedRemaining)
+	}
+	if got[0].SeedUnit != "" {
+		t.Errorf("seedUnit = %q, want empty", got[0].SeedUnit)
+	}
+	// But "several lots, no single total" must stay distinguishable from "none".
+	if got[0].SeedLots != 2 {
+		t.Errorf("seedLots = %d, want 2", got[0].SeedLots)
+	}
+}