Are you tired of unsightly weeds creeping into your lawn? Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer for Lawns Concentrate is formulated to kill tough weeds in your lawn, when used as directed. The formula kills ground ivy (creeping charlie), speedwell (veronica), wild violet, and other tough lawn weeds as listed. Plus, it is rainproof 6 hours after application. Ortho® Weed B Gon® Chickweed, Clover & Oxalis Killer for Lawns Concentrate can be applied to Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass. Apply when weeds are actively growing and temperatures are below 90°F.