Spectracide Weed Stop For Lawns Concentrate 32 Ounces controls more than 200 types of weeds as listed – and it won’t harm your lawn when used as directed. This concentrated formula kills down to the root with overnight results. It controls all major broadleaf weeds including dandelion chickweed and clover (see product label for complete list). This product is rain fast in 6 hours so it won’t wash off. Available as a 32 ounce dilutable concentrate and as a 32 ounce ready-to-spray concentrate with a QuickFlip sprayer that attaches to your garden hose. For best results mow before treating weeds with Spectracide 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 using.