Pea

Peas are projectiles that are fired by peashooting plants. The pea is the basic projectile in the game, and therefore a single pea is the base unit for measuring damage.

Plants vs. Zombies

 * Peashooter
 * Repeater
 * Threepeater
 * Split Pea
 * Snow Pea
 * Gatling Pea

Plants vs. Zombies Adventures

 * Peashooter
 * Sweet Pea
 * Beeshooter
 * Snow Pea
 * Ice Queen Pea
 * Flaming Pea
 * Repeater

Plants vs. Zombies 2: It's About Time

 * Peashooter
 * Repeater
 * Threepeater
 * Split Pea
 * Pea Pod
 * Snow Pea

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

Frozen Pea
A frozen pea can be shot by Snow Peas and Ice Queen Peas. Each of it does one normal damage shot to zombies, it will also slow down zombies. In Plants vs. Zombies, Slowing effect can be removed by fire peas and Jalapenos. A frozen pea will become a normal pea after passing through a Torchwood. However, in Plants vs. Zombies Adventures, fire peas will not remove the slowing effect.

Fire Pea
Fire peas are normal peas that have passed through a Torchwood. They can also be fired by Flaming Peas. Each fire 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. In Plants vs. Zombies, fire peas can "thaw out" slowed zombies and a frozen pea that passes through a Torchwood will turn into a regular pea. In Plants vs. Zombies Adventures, fire peas deal double damage and breaks the Ice Block Zombie's ice block in one hit.

Napalm Pea
When you put Plant Food on a Torchwood in Plants vs. Zombies 2: It's About Time, the fire will turn into napalm. Every pea passing through the upgraded Torchwood will become napalm peas, doing even more damage to zombies than fire peas.

Big Pea
These peas are big and do approximately 19 damage when you Plant Food a Repeater or a Split Pea in Plants vs. Zombies 2: It's About Time.

Big Fire Pea
These peas deal 38 damage, and are formed by a big pea passing a Torchwood.

Big Napalm Pea
These peas do 47 damage and are very strong that are formed by a giant pea passing a Napalm Torchwood.

Giant Pea
These peas are extremely big and appears when you Plant Food a Pea Pod in Plants vs. Zombies 2: It's About Time.

Giant Fire Pea
These peas are formed by a giant pea passing a Torchwood.

Giant Napalm Pea
These peas are formed by a giant pea passing a Napalm Torchwood.

Candy Pea
Candy peas are the projectiles fired by Sweet Peas. They resemple circular mints, and deal a small bit more damage than regular peas.

Bee
Bees are the projectiles fired by Beeshooters. They deal 2x the damage as regular peas.

ZomBotany Pea
Peashooter Zombies and Gatling Pea Zombies from ZomBotany and ZomBotany 2 fire peas. They are just normal 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.
 * The Beeshooter is a lot like most peashooting plants, but it shoots bees instead of peas.
 * Pea also rhymes with bee.