Weed Preventer, safe for use around over 200 established flowers, vegetables, trees and shrubs as listed on the label. One application prevents weeds for up to 3 months. By preventing new weeds from sprouting - it virtually eliminates the need for difficult and time-consuming hand-weeding. Without weeds, your valuable plants can grow larger and stronger. Your garden beds will stay neat and weed-free all season long! Covers up to 900 square feet.