Grass and weed preventer. One application prevents weed for up to 4 months. Forms a protective barrier in the soil surface which prevents weeds from emerging. Controls weed including Henbit, Prostrate Knotweed, Shepherdpurse, Yellow Wodsorrel, Crabgrass, Foxtail, Common Chickweed, and Common Purslane. Ideal for use on listed established flowers, roses, trees, and shrubs. Active ingredients: 1.0% Benefin, 1.0% Oryzalin. 10 lb (pound) bag.