Caulicopter

The Caultcopter is plant-based air support. Planting the plant does not directly summon anything. Instead, 500 sun has to be placed on the planted "beacon" to summon one Caulicopter for two minutes. During which time, the Caulicopter will go around targeting all zombies and mowing them down with miniguns firing cauliflower bits. Against zombies which fly, it will fire air-to-air missiles to kill them.

It should be noted the Caulicopter in the air is immune to all attack, but its beacon isn't. When the beacon is destroyed, the Caulicopter will crash and give up on providing your plants air support.