The Roof is the final set of five levels in the Adventure mode. It takes place on the roof of your house, where zombies have used ladders to climb up. You need to place flower pots before you can plant any plants on the roof, since there is soil. The level takes place during the daytime, so you gain sunlight automatically.
Zombies can be dropped by Bungee Zombies onto the middle of the roof, even onto your plants, so only the back row of plants is a fully effective defence.
