Use Ortho GROUNDCLEAR® weed and grass killer super concentrate to kill all types of weeds and grasses. Kills crabgrass, dandelion, nutsedge, 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 to 2 weeks. A single application controls most listed weeds. Rainfall or watering 15 min after application will not reduce weed control. The quick kill formula of Ortho GROUNDCLEAR® weed and grass killer super concentrate starts working immediately.