Lawn

The Lawn is where you fight against the zombies. It also refers to the Roof and the Pool.

Form
The Lawn is arranged in a grid, which has nine columns, and five rows (in the Roof, Night, and Day stages) or six rows (in the Pool and Fog stages) that you can plant on, one plant per gridsquare. Gridsquares can also contain Graves, where you can plant nothing but Grave Busters. Also, a Crater is a hole in The Lawn that can't be planted in. It takes up one gridsquare.

How it works
Zombies approach from the left side of The Lawn, and eat your Brains if they get through your defenses. In the first two stages, which are in the Front Yard, you have Lawn Mowers which run over all the zombies in a row, or Lane, completely destroying them. This only works once though, so try not to use them up at all. Later, in Pool, the Lawn Mowers will only get the Zombies that are out of the water at the time, so it is recomended to buy the Pool Cleaners as soon as possible. On the Roof, there will be nothing at the back until you buy the Roof Cleaners from Crazy Dave, so do it as soon as possible. Note that all of these provide an extra 50$ at the end of a level if unused.