Kills both purple and yellow Nutsedge/Nutgrass. Kills Horsetail. Contains a surfactant for superior product adhesion. Covers 1,000 sq. ft. Step one : Pour - combine entire SedgeHammer+ packet with 1gal of water. Step two: Mix - Shake or stir to mix well, no need for additives. Step three: Spray - spray on all affected areas. Product is rain fast within four hours.