Ortho GroundClear 2 Gal. Concentrate Year-Long Vegetation Killer is specially formulated to kill weeds and grasses while preventing new growth for up to one year. This powerful concentrate is designed for easy use—simply mix 24 fluid ounces with 1 gallon of water in a tank sprayer. It is for application in areas where you want to keep weeds from growing, such as driveways, sidewalks, gravel areas, rock and desert landscapes, under decks, parking areas, along fences and curbs, and other unplanted spaces. The fast-acting formula works on actively growing weeds, delivering visible results in as little as three hours, helping you maintain a clean and weed- environment with minimal effort. Model Number: