Bayer Advanced 3-In-1 Weed & Feed For Southern Lawns feeds lawns, kills existing broadleaf weeds, and prevents broadleaf and grassy weeds for up to six months – including crabgrass and Poa annua. Developed for homeowner use and specially for southern lawns, the product is labeled for use on the major southern turf types: bermudagrass, centipedegrass, St. Augustinegrass and zoysiagrass. The product can be applied in both spring and fall, in accordance with label instructions.