Level 3-10

Level 3-10 is the thirtiethPlants vs. Zombies level and the tenth Pool level. To complete this level, the player must not let the zombies into his or her house. When the player is finished with this level for the first time, he or she earns the Sea-shroom.

Difficulty

 * The player has to deal all of the difficult zombies at one time, with the combination of Buckethead Zombies, Zombonis, and Bobsled Teams. Thankfully, the player is provided with useful plants, making the level slightly easier (but still difficult).

Strategies

 * Given plants:
 * Threepeater
 * Torchwood
 * Tall-nut
 * Tangle Kelp
 * Spikeweed
 * Jalapeno
 * Squash
 * Lily Pad
 * Plant the first Threepeaters you get on the second and fifth lanes (the grass lanes closest to the pool) so it can inflict damage on zombies everywhere. Start doubling up on Threepeaters and start planting them on the outside lanes and the pool lanes.
 * When you think you have planted enough Threepeaters, put the Torchwood you get surrounding the Threepeaters from the outside to double the amount of damage. Then plant Tall-nuts, Tangle Kelp, and Spikeweed on the outside.
 * When a Zomboni comes, use an instant kill, a Jalapeno or a Squash (if you don't have a Jalapeno) or use the Spikeweed to kill them instantly. Make sure to also be ready for the Bobsled that comes out if you don't use the Jalapeno!
 * Whenever you have a lot of zombies in a row (preferably on the outside lanes since they are weaker, use a Jalapeno to instantly kill all of them.