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Crazy Dave sells the Mushroom Garden for $30,000. Before you obtain the Mushroom Garden, your nighttime plants that grow from sprouts will sit in your zen garden sleeping. They will not be able to grow beyond their first stage until you have bought the Mushroom zen garden from Dave. Nighttime mushrooms drop readily from nighttime mini-games or nighttime survival mode boards. Each of these plants, when fully grown, can be sold for $10,000.
The Aquarium Garden can also be purchased from Crazy Dave for $30,000, and plants that reside in a pot full of water in their first stage are the ones that can be transported to this garden. Some plants are both aquatic and nighttime plants, so they will rest in a pot of water sleeping in your zen garden. These will wake up in the Mushroom Garden, but they will not grow until they are moved to the Aquarium Garden. Full grown plants in the Aquarium Garden will also sell for $10,000 each, so playing pool boards, especially nighttime pool boards, can rapidly fill your Aquarium Garden.

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In order to move plants between the zen gardens, you must first purchase the wheelbarrow from Crazy Dave. Then simply click on the wheelbarrow and click on the plant you want to move. Alternately, you can also pick up the plant you want to move with your gardening gloves and place it on the wheelbarrow. Then click the yellow arrow to switch between your gardens. Click the wheelbarrow again and place your plant into its new space. Remember to check both of these zen gardens often because Stinky will only collect coin from the primary Zen Garden.