Last Stand: Corn on the Cob

This Strategy uses Cob Cannons to kill the Zombies while Garlics divert them away from your Cob Cannons. Dolphin Riders are stopped to buy you more time. This strategy requires a lot of skill, as you need to use the Corn Cobs effectively. This can be used as target practice for Survival: Endless strategies with lots of Cob Cannons.

Plants

Kernel-pult

Cob Cannon

Garlic

Lily Pad

Tall-nut

Instant Kills (optional)

Least Seed Slots: 6.

Strategy
Start off by planting three Cob Cannons in the top row, and three in the bottom row with to Garlics in front in both rows. Simply add two Tall-nuts in the Pool. You need to aim the Cobs at groups of Zombies, and replace Garlics (or Tall-nuts) when necessary, and you can place Tall-nuts on land if you want. Jack-in-the-box Zombies can pose a threat if they aren't killed quickly, and Dolphin Riders are annoying as well, but this strategy isn't too hard with a bit of practice. Here is a picture of the top (or bottom) row:

C-C C-C C-C G G

C-C=Cob Cannon. G=Garlic.

Check out my other Strategies: Last Stand: Flaming Fury & Last Stand: Winter Fumes