Grey Matter Gardens was the tenth map stage of Plants vs. Zombies Adventures. It resembled a giant garden. It introduced the Mall Cop Zombie to the player. After the player completed Level 6, the player unlocked the Bamboom to buy with Gems, and the player was given three free Bambooms. After the player completed Level 26, they obtained the Bee Hive, which was used to unlock The Fitness Lot.
It was called Grey Matter Gardens because the human brain is made of grey matter, closely clustered nerve cells, and the hedge maze located in the middle of the map resembled a brain.
Grey Matter Gardens contains 26 stages.
- Surrounding the levels, there were topiaries of a Zombie, a Peashooter, a Sunflower, a Cherry Bomb, a Wall-nut, a Beet, and a Magnet Plant.
- Some of these topiaries were available to buy to decorate the Player's Town.