Preen Garden Weed Preventer

Prevents summer and winter annual weeds from growing in flower and vegetable beds and around trees and shrubs for >up to 3 months. Without weeds competing nutrients, and space, your plants will grow larger and stronger. Prevents new weeds from growing, it does not kill existing weeds. Works by creating a chemical barrier in the top 1 to 2 inches of the soil that prevents cell division in developing weed seeds.