Roundup For Lawns6 is a tough weed killer for use on southern grasses that kills weeds, not the lawn. This product kills 93 types of weeds, including dollarweed, dandelion, clover and yellow nutsedge. It can be used on southern grasses, including bermudagrass, bahiagrass, centipede and St. Augustine. The ready-to-spray applicator covers up to 6000 sq-ft. Simply connect the sprayer to your hose and turn on the water. This product starts working immediately and is rainproof in 4 hours. Roundup For Lawn6 kills the root so weeds won't come back. The excellent time for broadleaf weed applications is when weeds are young, actively growing and soil moisture is adequate. Weeds typically twist, curl or yellow within a few days of application, while weed death can occur within 14 to 28 days. Roundup For Lawns6 is a simple step for home lawn care. No weeds. No worry.