Control the bothersome weeds in your lawn without harming your grass when used as directed with Ortho Weed B-gon Lawn Weed Killer + Crabgrass Control. This herbicide kills major broadleaf and troublesome grass weeds to the roots including dandelion, poison ivy, oxalis, chickweed, clover, dollarweed, crabgrass, and foxtail. In addition, this weed killer is rainproof in 1 hour and gives results with 1 application. Ortho Weed B-gon Lawn Weed Killer + Crabgrass Control is for use on grasses including Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass. Apply when weeds are small and actively growing in the spring or fall. To use, install the battery-powered Ortho Comfort Wand from your previous bottle, to easily reach and spot treat weeds with a continuous stream - no bending or pumping required! This product is intended for the treatment of individual weeds, patches of weeds, or sparse weeds scattered throughout home lawns. Spray only the weed, not the entire lawn.