Now I show a level that I designed

There should be at least 1.5 minutes between each wave. The maximum dynamic difficulty can be adjusted to one minute intervals.

It is worth noting that lychee is an aoe plant, and the zombies are generally low in health, lightning reed control pigeon feeder, such a density of zombies can be controlled with lychee, and lightning reed also has aoe ability. Controlling the ratio of Phragmites australis to Lychee is the strategy of this level. Squash is also aggressive against a group of zombies. But the cost of lightning reed is high, so the planting quantity of sunflower should be controlled. Too much will lead to an inability to fight effectively in the early stage, and too little will lead to only litchi as a 3 × 3 attack plant, with little output and no remote attack to assist.