The zombies noticed the sunflower field and decided to go through it to reduce the path. This means only one thing - after passing the crowd of deaths from the plants, nothing will remain. Sunflowers decided to resist Zombies vs. Sunflowers, and other plants joined them. But the plants of plants need a commander who will use a smart strategy to repel zombie attacks. At the same time, you have to use existing resources. Sunflowers cannot shoot, but they will throw stars, and you can place shooting plants in the Zombies vs. Sunflowers.
