Use Bonide Sedge Ender to kill existing weeds and prevent new weeds from growing. This formula is incredibly effective on goosegrass, nutgrass (and all sedges), crabgrass, foxtail and many other problem grassy-type weeds. Bonide Sedge Ender is safe for use on northern and southern grasses and has excellent cool weather performance. One pint treats up to 5,800 sq. ft.