Preen® 24-63800 Garden Weed Preventer, 16 Lbs, Covers Upto 2560 Sq.Ft.Stop weeds before they start. Preen Weed Preventer stops weeds from germinating in flower and vegetable gardens, in ground covers and around trees and shrubs. Preen will not kill existing weeds. It will prevent new weeds from sprouting eliminating the need for difficult and time consuming hand weeding. Without weeds, your valuable plants can grow larger and stronger. 16 lbs Covers 2560 square feet Stops weeds before they start Your beds will stay neat