Cabbage-pult

The Cabbage-pult is the primary offensive plant for the early roof levels, throwing cabbages that do 2 normal damage to zombies.

Usage
The Cabbage-pult shoots half as fast as a Peashooter, but does about twice as much damage. The cabbages are not stopped by screens, hitting the zombies directly in the head. It can also fire from the lower sections of the roof, letting you fit more offensive power on the map. Like all lobbed-shot plants, it can also damage Screen Door Zombies and Ladder Zombies directly when they still have their shields, and Snorkel Zombies while they're underwater.

Strategy
Since it is more reliable than the Kernel-pult and cheaper than the Melon-pult, it makes a good basic weapon. However, it's not good enough for difficult levels (except perhaps for harder levels where you want to start out with something basic, as the cabbage can hit shield zombies directly), and the plant slots are too valuable to waste with a random plant. When setting up a Survival: Endless build, it is a good idea to use these instead of Peashooters, as you will be able to deal with Screen Door Zombies, Ladder Zombies and Newspaper Zombies immediately. This means that once you have it and the Kernel-pult it is best to use them as a replacement of the Peashooter, although it mostly depends on preference. It is best to use the three catapult plants in conjunction, planting the Cabbage-pult, Kernel-pult, and finally Melon-pult in that order as you build up enough sun.

Trivia

 * Cabbage-pult is the only catapult plant that cannot be upgraded.
 * This is probably because it is not specialized or related to something else; Kernel-pults are logically related to corn, and Melon-pults can deal with large numbers of zombies at once, making it an ideal target for a more powerful Snow Pea-type plant.