Yellow Nutsedge (Nutgrass)
Cyperus esculentus
Yellow Nutsedge (Nutgrass) (Cyperus esculentus) is a perennial sedge weed characterized by glossy yellow-green blades with prominent triangular stem cross-section; grows twice as fast as surrounding turf.. It anchors via a underground tubers/nutlets root system and is selectively controlled using Halosulfuron-methyl (SedgeHammer Plus) or Sulfentrazone (Dismiss) applied during late spring/early summer before plants produce mature underground daughter tubers..
Halosulfuron-methyl (SedgeHammer Plus) or Sulfentrazone (Dismiss)
Glossy yellow-green blades with prominent triangular stem cross-section; grows twice as fast as surrounding turf.
Always read and follow the manufacturer's EPA-approved pesticide product label. The label is the law under federal FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) regulations. Application rates, personal protective equipment (PPE), target weed maturity stages, temperature restrictions, and grazing or re-entry intervals specified on the EPA container label supersede all online recommendations. Local state regulations may restrict certain active ingredients.
University-Verified Herbicide Formulations
Professional active formulations cross-referenced against university weed science trials.
Tenacity Herbicide (Mesotrione 8 oz)
Active: 40% Mesotrione Selective Systemic
Gold standard selective pre- and post-emergent targeting crabgrass, ground ivy, yellow nutsedge, and clover during overseeding.
SedgeHammer+ Turf Herbicide (Halosulfuron 0.5 oz)
Active: 5% Halosulfuron-methyl with Surfactant
Pre-mixed with surfactant for 1-gallon sprayers. Translocates into underground nutlets without injuring cool or warm season lawns.
Need Professional Yellow Nutsedge (Nutgrass) Eradication?
Connect with state-certified pesticide applicators and licensed weed control technicians.
Botanical Identification Key for Yellow Nutsedge (Nutgrass)
Accurately identifying Cyperus esculentus is essential because spraying non-selective chemicals like glyphosate risks killing desirable lawn grass. Look for these botanical hallmarks:
- Foliar Morphology: Glossy yellow-green blades with prominent triangular stem cross-section; grows twice as fast as surrounding turf..
- Root Architecture: Anchored by a underground tubers/nutlets, making manual pulling ineffective unless the entire root crown is extracted.
- Growth Period: Active during perennial cycles, flourishing when lawn turf is stressed or cut too short.
Eradication Protocol & Selective Herbicide Selection
To eradicate Yellow Nutsedge (Nutgrass) while preserving your lawn turfgrass, apply Halosulfuron-methyl (SedgeHammer Plus) or Sulfentrazone (Dismiss) during Late spring/early summer before plants produce mature underground daughter tubers.. Ensure that the active ingredients match your host turfgrass tolerances:
- Temperature Safety Band: Apply when ambient air temperatures range between 65°F and 85°F. Never apply volatile ester herbicides in temperatures exceeding 85°F to prevent herbicide vapor drift and leaf burn.
- Adjuvant / Surfactant: For waxy or hairy weed foliage, mix with a methylated seed oil (MSO) or non-ionic surfactant according to EPA label instructions to enhance chemical cuticle penetration.
- Mowing Holdback: Do not mow the lawn 2 days prior to spraying or 2 days after application to maximize foliar surface area for chemical absorption.
Frequently Asked Questions About Yellow Nutsedge (Nutgrass)
01 How do I kill Yellow Nutsedge (Nutgrass) without harming my lawn?
Use a selective herbicide labeled for your specific turfgrass species containing Halosulfuron-methyl (SedgeHammer Plus) or Sulfentrazone (Dismiss). Spray when Yellow Nutsedge (Nutgrass) is actively growing during late spring/early summer before plants produce mature underground daughter tubers.. Always check your host grass in our weed triage tool before application.
02 Why does pulling Yellow Nutsedge (Nutgrass) by hand often fail?
Yellow Nutsedge (Nutgrass) anchors via a underground tubers/nutlets. Hand-pulling often breaks the crown or leaves underground root fragments, rhizomes, or nutlets behind, which triggers rapid regrowth. Systemic selective herbicides translocate down through the vascular tissue to destroy the entire root structure.
03 What class of weed is Yellow Nutsedge (Nutgrass)?
Yellow Nutsedge (Nutgrass) is classified botanically as a Sedge weed with a Perennial life cycle.
04 When is the best time of year to treat Yellow Nutsedge (Nutgrass)?
The optimal eradication window is Late spring/early summer before plants produce mature underground daughter tubers.. Applying when temperatures are between 60°F and 85°F ensures maximum chemical absorption and prevents foliar heat stress to your desirable lawn.