SedgeHammer Herbicide selectively controls nutsedge in turf and around established woody ornamentals in landscaped areas. When used as directed, SedgeHammer is one of the most effective products for the control of both yellow (Cyperus esculentus) and purple (Cyperus rotundus) nutsedge in cool season and warm season turfgrasses. Over the years, SedgeHammer has shown to be safe to many turfgrass species. Unlike other products, SedgeHammer controls sedges where they actually grow, underground, not just the leaves. Considered as one of the more "gentle to turfgrass" products. Pets and people can return to treated area once spray dries. A nonionic surfactant is an additive that aids the penetration of Sedgehammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable products to "sheet" or spread across a surface. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant. For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. If a nonionic surfactant is not available certain dishwashing detergents that contain high amounts of a nonionic surfactant may be helpful. Check the label of a dish soap to see if it contains a nonionic (not anionic) surfactant. The soap may contain both or just the anionic surfactant. If the label says it contains a nonionic surfactant, that is preferred. Dish soaps that are concentrated and are effective in grease dispersion often contain nonionic surfactants. Add the detergent last and mix by gently swirling together. See the"How to Use" page for more information.