diff --git a/popcorn/Assets/MyGame/Scenes/CornField/Scripts/CornField.cs b/popcorn/Assets/MyGame/Scenes/CornField/Scripts/CornField.cs
index 52993e3a..8840a809 100644
--- a/popcorn/Assets/MyGame/Scenes/CornField/Scripts/CornField.cs
+++ b/popcorn/Assets/MyGame/Scenes/CornField/Scripts/CornField.cs
@@ -337,6 +337,7 @@ public class CornField : MonoBehaviour
                         cornFieldMask.gameObject.SetActive(false);
                         TutorialManager.Instance.ShowTutorialConversation(6, () =>
                         {
+                            promoteGrowthButton.gameObject.SetActive(true);
                             gameData.FinishedFlags |= TutorialFlag.CornField;
                             GameDataManager.SaveGameData();
                         });
@@ -421,11 +422,6 @@ public class CornField : MonoBehaviour
                         seedling.SetSeedlingGene(newGene.FirstTime, newGene.Period / 3, newGene.Level);
                     }
 #endif
-                    // チュートリアル時新しい苗を隠す
-                    if (!gameData.FinishedFlags.HasFlag(TutorialFlag.CornField))
-                    {
-                        seedling.SetSeedlingGene(DateTime.MaxValue, Int32.MaxValue, newGene.Level);
-                    }
                 }).AddTo(compositeDisposable);
             }
         }