Prevents Suffocation: A thick layer of leaves blocks sunlight and oxygen from reaching the grass, creating fungus, bare spots & potentially snow mold.

Reduces Pest. Pests like rodents, ticks, mosquitoes and other insects attract to the damp, sheltered conditions under the piles. Eventually leading into your home.

Improves Soil Health: A thin layer of leaves of mulched leaves are very beneficial & can have much needed nutrients while a large accumalation can weeken grass roots.