These are the basic plants you will need to memorize in order to succeed in the game.
Sunflower – The life-blood of the game; produces sun. Even at night.
Pea Shooter – Important plant that shoots at oncoming zombies down the lawn.
Wall-nut – Large plant that sits on the lawn and holds oncoming zombies back. Zombies being held back by a walnut can still be shot.
Potato Mine – The potato mine is a very cheap plant, and is not activated instantly. After about 10 seconds, the mine will activate and then explode when a zombie nears, killing it and the mine instantly.