Cactus

The Cactus is a primary anti-air plant. According to its Suburban Almanac entry, it is female.

The Cactus could be any member of the genus Cactaceae, but it most resembles a Saguaro Cactus, but with a red flower instead of a white one.

Usage
The Cactus is essentially a Peashooter that shoots spikes, although it can stretch into the air to pop Balloon Zombies' balloons.

Suburban Almanac Entry
Cactus

Cacti shoot spikes that can hit both ground and air targets.

Damage: normal

Range: ground and air

She's prickly, sure, but Cactus's spikes belie a spongy heart filled with love and goodwill. She just wants to hug and be hugged. Most folks can't hang with that, but Cactus doesn't mind. She's been seeing an armadillo for a while and it really seems to be working out.

Cost: 125

Recharge: fast

Strategy
Build a column of them to keep your lawn safe from Balloon Zombies. They also make a good substitute for the Peashooter on any level you might encounter Balloon Zombies, although even though the cost difference is negligible, there is a disadvantage that if even a single Balloon Zombie comes into the lane, all of the Cacti will rise and fire at it. If there are no Balloon Zombies, however, you may be better off with peashooters.

Trivia

 * The Cactus is referred to as a female even though it looks like a male (although if you look very closely, it looks like a female).


 * The Cactus is one of the 3 plants that can kill or damage the balloon zombie. The others are Cattail and Blover (though, it looks like the Blover isn't killing or damaging the Balloon Zombie, just blowing them away).
 * Like the Torchwood, the zombies do not get hurt while eating the Cactus