Ortho GroundClear Year Long Vegetation Killer1-concentrate formula kills weeds and grasses right down to the roots and prevent new growth for up to 1-year (when used as directed). Use on 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. The fast-acting formula should be applied to actively growing weeds. For best results, apply on a sunny day when the temperature is above 60degF. Apply 1-time per year. This product is a concentrate. It cannot be applied directly out of its container. Mix 24 fl. oz. of product per 1 Gal. of water in a tank sprayer to treat up to 300 sq. ft. You will see visible results in hours with the fast-acting formula of Ortho GroundClear Year Long Vegetation Killer1. | Ortho Concentrate GroundClear Year Long Vegetation Killer | Size 1 gal