Pool is the third set of ten levels in Plants vs. Zombies. It takes place in your back garden, in which the middle two rows are taken up by a swimming pool, during the daytime. Most plants cannot be planted in the Pool unless you place a Lily Pad first, though you are given a few aquatic plants that can be planted straight into the water.
Plants:
| Plant | Cost | Effect | Unlocked |
| Lily Pad | 25 | Allows other plants to be planted in water | 3-1 |
| Squash | 25 | Squashes the first zombie in an adjacent square | 3-1 |
| Threepeater | 25 | Shoots in three rows, very quickly | 3-1 |
| Tangle Kelp | 25 | Aquatic, drowns the first zombie that approaches it | 3-1 |
| Jalapeno | 25 | Burns all zombies in its row | 3-1 |
| Spikeweed | 25 | Damages zombies that step on it | 3-1 |
| Torchwood | 25 | Increases damage of peas passing through it; unfreezes peas and zombies; uncovers fog in a radius of one square. | 3-1 |
| Tall-Nut | 25 | Strong shield over which zombies cannot jump | 3-1 |
