Ortho GroundClear Year Long Vegetation Killer2 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 Ortho GroundClear Year Long Vegetation 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. Water the day before application if soil is dry. Apply to bare ground or when weeds are actively growing and temperatures are above 60F. This product is a concentrate and must be diluted in 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. 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.