You receive a Zen Garden on the level 5-4 at the end
you need to finish a level in adventure mode,complete the level 5-4 to get zen garden.
5-4
When you find a suitable plant when you play a Pvz level
level 5-6 or 5-4
You can buy Stinky the snail from Crazy Dave's store after you beat level 5-4 to unlock the Zen Garden. After you have the Zen Garden, he will be available in Crazy Dave's shop for $3000. All he does is collect coins in your Zen Garden while you have it open.
What levels have you beaten?if you beat a certain level you will get a new plant trust me.i think you are gonna get a marigold soon for the zen garden.
if you wanna sell plants in your zen garden you have to have the selling glove
a garden of love <3
Get to the roof levels and near the end youll get the zen garden
you get your Zen garden when you are in the roof part on adventure
A "Zen Garden" typically refers to a minimalist garden of rocks and gravel arranged to permit the observer to slip into a meditative state without the diversion of a plethora of detail. In reality a "Zen Garden" or, for that matter Zen Cup of Coffee, Zen Desk, Zen Bus Ride, is anything or event which you can contemplate, without thinking, to become aware of it as itself and part of you, neither and both.