Doom-shroom

The Doom-shroom is the most powerful of the exploding plants.

Usage
Plant it, watch the screen get clear. It has a radius of about 3 squares. It takes about three minutes for the crater to vanish, during which time, nothing can be planted there. The Doom-shroom will crater water or roof squares, destroying the Lily Pad or Flower Pot.

?will it kill a gargantaur in one shot?

Strategy
This is the Atomic Bomb of plants. It can easily destroy Huge Waves of Zombies.