Kill weeds down to the root without harming your lawn (when used as directed)! Ortho WeedClear Lawn Weed Killer Concentrate kills and suppresses the growth of over 200 types of weeds, all major broadleaf weeds (see label for complete weed list) like dandelion, chickweed, clover, crabgrass and foxtail. The fast-acting formula is rainproof in one hour and delivers visible results after just one application. The herbicide is specially formulated to kill weeds to the roots and won't harm the lawn when used as directed. To use, mix this concentrated formula as directed on the label and apply with an Ortho Dial N Spray or tank sprayer. Apply when weeds are young and actively growing. Can be applied on multiple lawn and turfgrass varieties, including Bermudagrass, Buffalograss, Tall and Fine fescues, Kentucky Bluegrass, Ryegrass and Zoysiagrass. Each bottle creates 12.8 gallons of ready-to-use weed killer that can cover up to 5,000 sq. ft. entire lawn. People and pets may re-enter once treated area has dried.