Nutsedge survives from one season to the next by producing nutlets, which are small underground bulb-like seeds. … Once the region gets its first frost of the season, it dies off on its own; however, the nutlets under the soil survives over the winter and regrow the next year.

Does cold weather kill nutsedge?

A frost will kill the plant’s aboveground portion but the tubers will survive and overwinter in the soil.

What will kill nutsedge?

You can control nutsedge in your lawn by applying Ortho® Nutsedge Killer Ready-To-Spray. It’s effective against newly emerged and established sedges. The weed is yellowed in 1-2 days, and complete kill occurs in 2- 3 weeks. It can be used on Northern and Southern turf grasses and is rainproof in 2 hours.