BioAdvanced All-in-1 Lawn Weed and Crabgrass Killer kills even the toughest weeds down to the root. The exclusive formula kills over 200 broadleaf weeds like dandelion, clover and crabgrass without harming the lawn. This product starts working immediately and is rainproof in just 1-hour after application. It can be applied to a variety of lawn types including Fescue, Kentucky Bluegrass, Bermudagrass and more. Controlling weeds in your lawn has never been easier. Exclusive formula kills listed lawn weeds, plus crabgrass, to the root in one easy step Contains three proven weed killers to control lawn weeds and crabgrass down to the roots. When used as directed, it won't harm your lawn