Use plant food on mainly on damaged Wall-nuts. Be patient and see where the Repeaters will be needed before planting them. Once you have 14 plants on the field start removing the Sunflowers. Use Iceberg Lettuce to slow tougher zombies from damaging the Wall-nuts. Once you have a full line of Bong Choys, start planting Repeaters on the tougher lanes (Buckethead zombies, Pharaoh Zombies). If you see a Conehead or a Buckethead zombie, plant a Wall-nut in front of the Bong Choy. Keep plant Bong Choys and use the Grave Buster whenever it is off cooldown. Plant the first Bong Choy on the third tile wherever the first zombie shows up.
Use Grave Busters on the grave stones that are closest. Plants to pick: Sunflower, Wall-nut, Repeater, Grave Buster, Bong Choy, Iceberg Lettuce/Potato Mine.
