Mega Flower

Mega Flower is a plant only appearing in Gardens & Graveyards in Driftwood Shores. It is protected by several Flax Cannons. The zombies have to destroy it to win the game. In contrast, the plants have to defend it. If the plants defend the Mega Flower, there is a cutscene showing it laughing at the screen and winking. If the zombies destroys it, it shows a cutscene of its root cores bursting and the Mega Flower fainting.

Last stand
Once the plants have lost all their gardens their only hope to win the game is to defend the Mega Flower for five minutes. However the light house is very open allowing the zombies to easily access to the weak point of the Mega Flower.

Trivia

 * The Mega Flower is the gigantic version of the Sunflower.
 * It is said that the Mega Flower "is the guardian of the coast."
 * There are some blueprints in the Mega Flower lighthouse showing Crazy Dave blueprint to utilize the Mega Flower's power for a "Mega Sizzle Beam".