Cattail

The Cattail is an upgrade for the Lily Pad. It costs $10,000 to buy.

Usage
The Cattail has the damage and rate of fire of a Repeater. The spikes it fires are homing, and can hit zombies anywhere (except underwater).

Strategy
Because it can cover all six lanes, it makes a good first defensive plant. It also helps deal with Digger Zombies (it can shoot backward) as well as Balloon Zombies. Unfortunately, all your Cattails will fire at the same target, and when that target dies, and spikes in the air are wasted. This limits the effectiveness of large numbers of Cattails.

Also, be careful you don't deemphasize the defence of the water lanes too much.