Bouncing Bulbs were sentient plants that, if left to their own devices, will bounce around. Young plants were easy to manage while small, but larger bulbs could grow to the size of a doorway! They can be aggressive and if threatened, will try to hit a potential attacker. A Knockback Jinx was enough to stop smaller bulbs, but the Fire-Making Spell was needed to wither larger bulbs.

They were used as an ingredient in the Pompion Potion.