A nut grass killer is generally a type of herbicide targeted at controlling and killing this grassy weed. When treating nut grass, minimal disturbance to the ground is suggested, so herbicides are considered a preferable method of control.
To control the growth of nut grass for a lawn, spraying a product such as Ortho Nutsedge Killer for Lawns is effective for established and newly emerged sedges. This product kills kylinga, yellow and purple nutsedge along with 60 other weeds. After application, the weeds turn yellow within two days, and a complete kill occurs within three weeks. This product can be used on Southern and Northern turf grasses.