The IMAGE Nutsedge Liquid Weed Killer Ready-To-Spray is a post-emergent, selective herbicide that kills the toughest southern weeds including yellow and purple nutsedge, dollarweed, wild onion, sandbur, and annual blue grass. This weed killer is for use on most southern turf grasses and selective ornamentals. This herbicide treats up to 8,000 sq. ft. and connects to a garden hose for easy application. It has an effective active ingredient that starves weeds to death by blocking photosynthesis. Do not allow people or pets onto the treated areas until the spray has dried. Also, do not apply this product to St. Augustinegrass or Tall Fescue lawns for winter weed control. Re-apply 6 weeks after initial application for tough to kill weeds.