Spikeweed is an plant available in both main series Plants vs. Zombies games. It is normally ignored by most types of zombies, and can deal damage to any grounded enemy that walks on top of it at a rate equal to 4/3 of a Peashooter. Since the Spikeweed attacks from below, it can bypass shields. When encountering certain enemies such as Zomboni and Pianist Zombie, Spikeweed will instead instantly kill the unit at the cost of sacrificing itself.