Big Wave Beach Level 04

Quite a tough level, and one I did not complete without losing a couple of lawnmowers. My strategy was to plant sunflowers, take out the first few zombies with kelp weed then plant a column of wall nuts on lily pads just in front of the tide line, with pak choi behind those and double pea shooters behind those. I did have to remove some sunflowers later in the game to make room fro more double peashooters.