Use Ortho GroundClear Weed & Grass Killer Super Concentrate to kill all types of weeds and grasses. Kills crabgrass, dandelion, nut sedge, oxalis, and other weeds as listed. Apply this concentrated formula with a tank sprayer, following dilution directions. Apply around landscape areas, patios, walkways and driveways. Sprayed weeds usually begin to wilt within hours after application, with weeds completely killed within days to 1-2 weeks. A single application controls most listed weeds. Rainfall or watering 15 minutes after application will not reduce weed control. The quick kill formula of Ortho GroundClear Weed & Grass Killer Super Concentrate starts working immediately. | Ortho GroundClear Weed And Grass Killer Super Concentrate | Size 32 oz