Solarization for Nutsedge Control in St. Augustine/Bermuda Lawns

Nutsedge (nutgrass) resists selective herbicides in mixed St. Augustine/Bermuda lawns. Solarization—superheating moist soil under clear plastic for 6 weeks—kills everything: nutsedge, seeds, pathogens, and beneficials. It's a nuclear reset.

Process: mow low, till, soak soil 2–3 feet deep, spread aged manure/alfalfa meal, cover with heavy clear plastic sealed at edges. Maintain moisture and heat for 6 weeks. Do not till afterward—buried viable seeds may resurface.

After solarization, reseed with quality grass from reputable sources. Montana State University provides detailed solarization guides.

This extreme measure suits lawns where nutsedge dominates. For minor infestations, halosulfuron (SedgeHammer) offers selective nutsedge control in both grass types.