Preen Weed Preventer Granules 31.3 lbPreen Garden Weed Preventer allows users to apply to prevent weed seeds from germinating. Spread 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. Stop weeds before they start for up to 3 months, guaranteed Safe for use around over 200 established flowers, vegetables, trees and shrubs Can be sold as a refill for flip top bottle