Zombies Enemy: Regular, Conehead, Pole Vault, Screen Door
Recommended Plants: Sun-shroom, Sunflower, Puff-Shroom, Fume Shroom, Wall-Nut, Grave-Buster, Repeater, Chomper
Use the same strategy of 5~6 Sun-shroom plus sunflower at the beginning of the stage. Spam puff-shroom to handle the beginning waves. Fume shroom is your best friend in this stage as they can take down screen door and pole vault zombies easily. As the stage progresses and you earn more sun, use grave busters to take down all the tombstones.
You can also replace 1 row of fume shroom for repeaters although fully stacked fume shrooms are extremely powerful as they deal damage to multiple zombies at the same time. You can consider to plant a row of wall-nut to better protect your turf. You should be able to kill all the zombies in no time.