This product stops the growth of nutsedge weeds by moving through the plant and affecting the underground growing points. Simply mix the contents of this .5 ounce packet with one gallon of water and spray the target weeds thoroughly. This nutgrass killer specifically controls yellow and purple nutsedge and other tough broadleaf weeds and suppresses kyllinga. This product can be used without hurting turfgrasses St. Augustine grass, Bermuda grass, Kentucky bluegrass and cool & warm season grasses.