Ortho GroundClear Weed & Grass Killer has been specifically formulated to kill all types of weeds that are green and growing. Use it to kill weeds on hardscapes, in landscape beds, and around vegetable gardens (apply directly to weeds). The fast-acting spray produces visible results in just 15 minutes! OMRI listed. Acts on contact; see results in 15 minutes. Rainproof in 2 hours (upon drying). Active ingredients: Ammonium Nonanoate