diff --git a/src/data/items.h b/src/data/items.h
index f1718a7e3e..1a9fca56c1 100644
--- a/src/data/items.h
+++ b/src/data/items.h
@@ -6939,6 +6939,7 @@ const struct Item gItems[] =
         .itemId = ITEM_ELECTRIC_SEED,
         .price = 4000,
         .holdEffect = HOLD_EFFECT_SEEDS,
+        .holdEffectParam = HOLD_EFFECT_PARAM_ELECTRIC_TERRAIN,
         .description = sElectricSeedDesc,
         .pocket = POCKET_ITEMS,
         .type = ITEM_USE_BAG_MENU,
@@ -6951,6 +6952,7 @@ const struct Item gItems[] =
         .itemId = ITEM_GRASSY_SEED,
         .price = 4000,
         .holdEffect = HOLD_EFFECT_SEEDS,
+        .holdEffectParam = HOLD_EFFECT_PARAM_GRASSY_TERRAIN,
         .description = sGrassySeedDesc,
         .pocket = POCKET_ITEMS,
         .type = ITEM_USE_BAG_MENU,
@@ -6963,6 +6965,7 @@ const struct Item gItems[] =
         .itemId = ITEM_MISTY_SEED,
         .price = 4000,
         .holdEffect = HOLD_EFFECT_SEEDS,
+        .holdEffectParam = HOLD_EFFECT_PARAM_MISTY_TERRAIN,
         .description = sMistySeedDesc,
         .pocket = POCKET_ITEMS,
         .type = ITEM_USE_BAG_MENU,
@@ -6975,6 +6978,7 @@ const struct Item gItems[] =
         .itemId = ITEM_PSYCHIC_SEED,
         .price = 4000,
         .holdEffect = HOLD_EFFECT_SEEDS,
+        .holdEffectParam = HOLD_EFFECT_PARAM_PSYCHIC_TERRAIN,
         .description = sPsychicSeedDesc,
         .pocket = POCKET_ITEMS,
         .type = ITEM_USE_BAG_MENU,