Take back your lawn from weeds with Ortho WeedClear Weed Killer for Lawns Concentrate. This lawn weed control product kills all listed weeds without harming your lawn (when used as directed). It kills over 250 major broadleaf weeds down to the root, including dandelion, chickweed, clover, spurge, oxalis, and others as listed. The formula produces results in hours with just 1 application and is rainproof in 1 hour. Use this weed killer on listed lawn grasses, including St. Augustinegrass (not Floratam), Bermudagrass, Centipedegrass, Zoysiagrass, Buffalograss, and Bahiagrass, Kentucky Bluegrass, Ryegrass, Tall Fescue, and Fine Fescue. This product is a concentrate and must be diluted before use. To use, mix with water per label directions and apply using a tank sprayer or Ortho Dial N Spray hose-end applicator. Spray only until the surface of the lawn is wet. For best results, apply to actively growing weeds in spring or fall when daytime temperatures are below 90°F. Do not allow people or pets to enter the treated area until sprays have dried. This 1 gal. container of Ortho WeedClear Weed Killer for Lawns Concentrate treats up to 64,000 sq. ft.