Ortho Ground Clear Year Long Vegetation Killer is formulated to kill weeds and grasses and prevent new growth for up to 1 year. This ready-to-use product can be applied with the attached Comfort Wand to areas where weeds are not desired, including driveways, sidewalks, gravel areas, rock and desert landscapes, under decks, on parking areas, along fences and curbs and in unplanted areas. This fast-acting formula should be applied to actively growing weeds. You'll see visible results in an hour with Ortho GroundClear Year Long Vegetation Killer. Treats up to 400 sq-ft.