Image Weed Killer for Southern Lawns Concentrate is easy on lawns, tough on weeds. This product is formulated specifically for the South for a weed-free lawn. It kills major broadleaf weeds, roots and all. This fast-acting formula starts working immediately and won't harm your lawn when used as directed. Can be used to control weeds in southern turfgrasses including St. Augustinegrass (including Floratam nd Bitterblue), Bermudagrass, Centipedegrass, and Zoysiagrass. Apply when temperatures are between 45 Deg F to 90 Deg F. Kills major broadleaf weeds including dandelion, chickweed, clover, and other listed weeds.