diff --git a/backend/app/models/plant.py b/backend/app/models/plant.py
index 526ec22..d5d8c0c 100644
--- a/backend/app/models/plant.py
+++ b/backend/app/models/plant.py
@@ -89,6 +89,7 @@ class PlantWithVarieties(SQLModel):
     astuces_culture: Optional[str] = None
     url_reference: Optional[str] = None
     notes: Optional[str] = None
+    created_at: Optional[datetime] = None
     associations_favorables: Optional[List[str]] = None
     associations_defavorables: Optional[List[str]] = None
     varieties: List[PlantVariety] = []