Snow Pea

The Snow Pea does the same amount of damage as the Peashooter, but it also slows the target, making this a valuable asset in your arsenal.

Usage
Plant Snow Peas anywhere you would plant Peashooters. They have the same damage and rate of fire as a Peashooter, but since they slow zombies down, they can actually do more damage to a zombie before it can reach the Snow Pea. Slowed zombies move and attack about half as fast as regular zombies of their type. It can also slow down fast zombies but cannot slow down the Zomboni.

Suburban Almanac Entry
Snow Pea

Snow Peas shoot frozen peas that damage and slow the enemy.

Damage: normal, slows zombies

Folks often tell Snow Pea how "cool" he is, or exhort him to "chill out." They tell him to "stay frosty." Snow Pea just rolls his eyes. He's heard 'em all.

Cost: 175

Recharge: fast

Standard levels
A single column of Snow Peas will slow the the incoming horde. Multiple Snow Peas in a single lane don't perform much better, not providing additional slowing effects, so unless you're getting them for free, there's probably no need to plant more than one per lane. Of course, having multiple is helpful when zombies eat one, as they will remain slowed. On the roof levels, Snow Peas cannot shoot over the roof's edge unless they are in the first sloped column, so they are not too helpful.

Snow Peas work well in conjunction with Wall-nuts/Tall-nuts and Spikeweed/Spikerock. Slowing the zombies down allows more time for the spikes to do damage to the zombies.

Note that if a frozen pea passes through the flame of a Torchwood, it will only thaw into a regular pea. Furthermore a slowed zombie hit with a flaming pea will thaw, so it is generally unwise to use Snow Peas in the same lanes as Torchwoods. But if two Torchwoods are placed in the same row where a Snow Pea is planted, the frozen pea will turn into a flaming pea. Also, Screen Door Zombies are immune to the Snow Pea's slowing effect as long as they still have their screen door; the same applies with Ladder Zombies and their ladders, as well as Newspaper Zombies and their newspapers.

Slot Machine Mini-game
You can't really control when you get Snow Peas, but try to spread them out, one per lane, until you have at least one in each lane.

Trivia

 * Its name is a reference to the snow pea, a pea that grows at the end of winter.
 * This is one of the three Plants that have ice crystals and freeze Zombies that approach Your House, the other two being the Ice-shroom and the Winter Melon.
 * Snow peas are effectively the same as a Repeater, because they do the same amount of damage per step the zombie takes.