Pea

Peas are projectiles that are fired by Peashooters, Snow Peas, Repeaters, Threepeaters, Split Peas, and Gatling Peas. The pea is the basic projectile in the game, and therefore a single pea is the base unit for measuring damage.

Pea
A normal pea can only be shot by Peashooters, Repeaters, Threepeaters, Split Peas, and Gatling Peas. Each of it does one normal damage shot to zombies.

Frozen Pea
A frozen pea can only be shot by Snow Peas. Each of it does one normal damage shot to zombies, it will also slow down zombies. Slowing effect can be removed by flaming peas and Jalapenos. A frozen pea will become a normal pea after passing through a Torchwood.

Flaming Pea
Flaming peas are normal peas that have passed through a Torchwood. Each flaming pea does the equivalent of two normal damage shots to its target, with a small splash effect with a damage of 0.7 normal damage shot. However, flaming pea can "thaw out" slowed zombies and a frozen pea that passes through a Torchwood will turn into a regular pea.

Zombies' Peas
Peashooter Zombies and Gatling Pea Zombies from ZomBotany and ZomBotany 2 fire peas. They hit plants for half the damage of a bite. Plants that are short enough (Puff-shroom, Sun-shroom, Lily Pad, Potato Mine, Spikeweed and Spikerock) will not be hit by them.

Trivia

 * The pea is incredibly big, slightly bigger than the size of a zombie's hand.Allpea.png
 * It is unknown how the Gatling Pea and Threepeater can fire peas without their mouths bulging, as the holes used to shoot peas from them is much smaller than other peashooting plants.