Ice-shroom

The Ice-shroom freezes all the zombies on the screen for a few seconds. It is single use, to activate it just drop it in any empty spot on the screen. After a second, the Ice-shroom will freeze every zombie on the screen (including Gargantuar and/or Dr. Zomboss, but not counting Zombonis, which can't be frozen, Balloon Zombies with Balloons, Dolphin Rider Zombies with Dolphins, or Pogo Zombies with pogo sticks, as they will slow down but not stop completely or not freeze at all) and do a slight amount of damage to each one. Zombies will unfreeze after a couple of seconds, but then will be slowed for a few or more seconds.

Suburban Almanac Entry
Ice-shroom

Ice-shrooms temporarily immobilize all zombies on the screen.

Damage: very light, immobilizes zombies.

Range: all zombies on the screen

Usage: single use, instant

Sleeps during the day

Ice-shroom frowns, not because he's unhappy or because he disapproves, but because of a childhood injury that left his facial nerves paralyzed.

Cost: 75

Recharge: very slow

Standard Levels
Plant the Ice-shroom when tough zombies (like the Gargantuar) are trying to eat your other plants. Against Dr. Zomboss, the Ice-shroom can be used to destroy fireballs, and also to freeze him so he can be damaged for more seconds at a time. In Survival: Endless it may be a good idea to plant an Ice-shroom before it is needed so it can be saved for later, but this may not work if there are hard-to-stop zombies that could get to it and eat it. In iPhone/iPod Touch/iPad version of the game, immobilize 20 full-sized zombies with a single Ice-shroom will earn you the 20 Below Zero achievement.

Whack-a-Zombie Mini-game
Use the Ice-shroom when you need a little extra time to whack a large wave of zombies. If you have enough Sun, you can take that time to drop a Grave Buster at the same time. Use this only during the later part of this level as there will be more Zombies.



Trivia

 * The Ice-shroom is one of the only three plants that have ice crystals on their body. The other two are Snow Pea and the Winter Melon.
 * Although the Almanac says Ice-shroom damage is very light, its damage is actually equal to a pea. Therefore, 10 Ice-shrooms would kill a normal Zombie, 28 for a Conehead Zombie and so on.