Before playing the game, first you need to understand the attack power of these zombies and green plants, which attack power is large, which attack power is small, so that you can defeat the zombies. After opening the game, you will finish a tutorial level zombies come in only 1 way. Collect the sun and plant a good pea shooter on it, but don't plant the pea shooter on the right where the zombies appear to kill themselves and you can easily pass the level. Be sure to calm down first, ignore the zombies. Put on 6 sunflowers in one breath. Then fill the pea shooter can be, the money to fill the pea shooter, the back does not need sunflowers. When you pass the level and get the cherry bomb. After the tutorial level is over the game officially begins, only 1 way or 3 way, and the zombies will also come out slowly. This level of zombies out of the fast, but hold your breath, first build 4 sunflowers and then out of the pea shooter, the back while replenishing the sunflowers, while putting the pea shooter can. The wall fruit, defensive plants, weaknesses are able to be jumped by the pole zombie. Maybe you can build 5 sunflowers first. This level of plastic zombies more, two pea shooters enough to deal with. To be on the safe side, you can also build a few wall fruit to block the road. After passing the level. You will get the shovel, you can dig up the plants that have been put in place and replant other plants. In short, repeat the process, develop a strategy and you will win.