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The Wall-nut is the first defensive plant that acts as a shield for your plants. Place a Wall-nut in front of your plants to block the zombies. Vaulting Zombies can jump over it, but they cannot jump over a Tall-nut, its tougher counterpart. It is named after the edible seed walnut, specifically the Juglans regia. It is used to stall zombies to waste their time, letting other plants attack them.