This time of year, you will need something more specific to nutsedge on the label, BUT if you catch nutsedge young, gly will take care of it. I killed half an acre of nutsedge with gly last year in early summer, before it matured. I purchased some chemical specifically for nutsedge (basagran), but I just held onto it for some other time, if I need to kill some after it is more mature.