Dropped Zen Garden plants will not contain normal Marigolds, any of the , or a Flower Pot. Marigolds, when fully grown, can be sold for $3,000. Other day plants, including Grave Busters and Planterns, can be sold for $8,000 when fully-grown. and aquatic plants can be sold for $10,000 when fully grown. The best way to get Zen Garden plants is to play Survival: Endless, as all plants can be obtained in it and it is the level with the greatest number of zombies.