Preen Garden Weed Preventer allows users to apply Preen to prevent weed seeds from germinating. Shake on bedding areas and water in to prevent weeds for up to 3 months. Use in flower, shrub and all bedding areas. All existing weeds and grasses must be removed prior to use. Guaranteed to stop weeds before they start for up to 3 months Safe for use around over 200 established flowers vegetables trees and shrubs as listed on the label Prevents new weeds from sprouting eliminating hand weeding Sprinkle around flowers vegetables trees and shrubs to control crabgrass chickweed and other common weeds Apply anytime spring summer or fall Applicator scoop included Made in USA Not for use on lawns For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.