Make troublesome broadleaf weeds in lawns a problem of the past. Roundup For Lawns3 Ready-To-Spray is a tough weed killer for Northern grasses that kills weeds, roots and all (when used as directed), with up to 3 month weed control (as listed). This product kills 253 types of weeds (see inside booklet for weed list), including crabgrass, dandelion, clover, yellow nutsedge, poison ivy, chickweed, oxalis, and purslane (see inside label booklet for weed list). In addition, it starts working immediately and is rainproof in 3 hours. Roundup For Lawns3 is for use on Northern grasses, including Kentucky Bluegrass, Perennial Ryegrass, Fescue spp. including Tall, Red, and Fine Leaf Fescues, and Zoysiagrass. For best results, apply this product to actively-growing weeds during the early growth stages. Use in the spring or fall when daytime temperatures are between 45°F and 90°F. Simply connect the sprayer to a garden hose, turn on the water, and treat up to 5,000 sq. ft with 1 quart. Do not allow people or pets to enter the treated area until sprays have dried.