Kill and prevent weeds and grasses with Ortho GroundClear Year Long Vegetation Killer2 Concentrate. This weed control product kills weeds, grasses, and existing vegetation, and prevents regrowth for up to 1 year. The fast-acting formula starts working immediately and is rainproof in 1 hour. Use this weed and grass killer where no plant growth is wanted for at least a year on driveways, sidewalks, fence lines, paver patios, walkways, gravel areas, parking areas and other hardscapes. This product is a concentrate and must be diluted with water before applying. To use, add 24 fl. oz. of Ortho GroundClear Year Long Vegetation Killer2 per 1 gallon of water in a tank sprayer to treat up to 300 sq. ft. Apply to bare ground or when weeds are actively growing and temperatures are above 60F. Do not use before planting lawns, fruits, vegetables, or other plants because the product remains active in the soil for up to one year. Do not enter or allow others to enter treated areas until sprays have dried. This 32 fl. oz. bottle of Ortho GroundClear Year Long Vegetation Killer2 makes enough prepared solution to treat up to 300 sq. ft.