Spectracide Large Plot Weed Stop For Lawns Concentrate kills more than 200 types of weeds as listed - and it won't harm your lawn when used as directed. This concentrated formula treats up to 32,000 square feet of Northern Grasses or 42,500 square feet of Southern Grasses with overnight results, and it kills weed roots. It kills all major broadleaf weeds, including dandelion, chickweed and clover (see product label for complete list). This product is rainproof in hours, so it won't wash off. Mix with water and apply with a pressure sprayer or hose-end sprayer at the rates directed on the label. For best results, mow before treating weeds with Spectracide Large Plot Weed Stop For Lawns Concentrate. Spray in spring when weeds are small and growing, or in fall when many problem weeds germinate - treating in fall will eliminate many of next year's weeds. If certain tough weeds are not dead within 3 weeks, repeat spot treatment. Read the entire label before usingRestricted in LA, TX