Stunion

Stunion is an instant use plant in'' Plants vs. Zombies 2: It's About Time. ''When zombies get close to it, it breathes out a cloud of gas, similar to the one emitted from a fainted zombie.

Plant Food upgrade
When fed with Plant Food, it releases a burst of gas in a 3x4 area in front of and next to it.

Trivia

 * Its name is a portmanteau of "stun" and "onion", which is a type of vegetable.