America's leading brand of garden weed preventer Blocks weeds before they start growing Proven, trusted for over 50 years Enjoy a weed-free garden, all season long. The best way to control weeds in the garden is to prevent them from getting started in the first place. One easy application of Preen Garden Weed Preventer keeps weeds from sprouting for up to three months. Your garden will stay weed-free all season long. Weeds rob desirable plants of water and other nutrients. Preen weed preventers stop weeds and eliminate time-consuming weed pulling chores. Go Weed Free With Preen, you’ll be free to enjoy a beautiful, weed-free landscape. Preen Garden Weed Preventer allows users to apply ready to use granules to prevent weed seeds from germinating. Spread on bedding areas and water in to activate. All existing weeds and grasses must be removed prior to use. Specifications Stop weeds before they start for up to 3 months guaranteed Safe for use around over 200 established flowers, vegetables, trees and shrubs Apply anytime in spring, summer or fall Not for use on lawns Weed preventer does not kill existing weeds Safe for use on edibles (see use directions for complete list) Handy applicator scoop included.