Let's Pea

Quick Summary
Let's Pea is a conveyer belt level with ONLY peashooting plants like Snow Pea, Peashooter, and Threepeater. There is no made up plants like Sun God Peashooter or Santa Pea. There is Wall-nut because of Football, Dancing, and maybe Buckethead Zombies. It is a day level with 4 flags

Common
Peashooter

Snow Pea

Uncommon
Repeater

Torchwood

Threepeater

Rare
Gatling Pea

Common
Zombie

Conehead Zombie

Once Every Flag
Flag Zombie

Uncommon
Pole Vaulting Zombie

Buckethead Zombie

Newspaper Zombie

Rare (after first flag)
Football Zombie

Dancing Zombie (plus backup dancers)

Yeti Zombie

Once in a Game (after second flag)
Gargantuar (plus imp)

Zomboni (plus bobsled team)

Strategy
I would place a row or 2 of peashooters, then a row or 2 of repeaters. I would also plant a row of threepeaters, then torchwoods. That would equal 4 to 6 rows of plants. Then plant a row of snow peas. The reason you are planting snow peas in the 5, 6, or 7th lanes is because if a snow pea went through a torchwood, it would thaw into a normal pea. Then, I would plant my wall-nuts. That should be enough to maybe even defeat the gargantuar zombie,