Ortho GroundClear Weed & Grass Killer with Comfort Wand, 1 gal. is a fast-acting formula designed to effectively eliminate weeds and unwanted grasses with visible results starting in just 15 minutes. This powerful weed killer targets a wide range of common weeds such as chickweed, algae, dandelion, ragweed, shepherd's purse, moss, mustards, and oxalis, among others. It also controls various grasses including large crabgrass, annual bluegrass, wild onion, and perennial ryegrass. I for use throughout the year, it works when applied to small, actively growing weeds that are 3 inches tall or wide. This versatile treatment can be safely applied to walkways, driveways, landscape beds, and areas under trees. Once treated, weeds will change from green to brown within 1 to 2 hours, providing quick and effective weed control.