Yellow Nutsedge
Cyperus esculentus · Perennial sedge, warm-season C4 plant
Grass Family
Cyperaceae
Grass Category
Weed Grass / Sedge
Variety / Cultivar
Wild type
Hardiness Zones
USDA Hardiness Zones 3 to 10. Excellent cold and heat tolerance due to dormant underground tubers.
About This Grass
An aggressive, grass-like perennial weed featuring bright yellow-green, V-shaped glossy leaves and distinctive triangular stems. Reaches heights of 1 to 3 feet when mature. Produces unique golden-yellow to straw-colored spikelets arranged in umbrella-like clusters at the stem apex.
Blade Characteristics
Medium-coarse texture, 3 to 10 mm wide, V-shaped cross-section, folded vernation, pointed tip, bright yellow-green or lime-green color with a shiny appearance. Ligules are absent; auricles are absent.
Root System
Fibrous root system featuring underground stolons that terminate in small, edible tubers called nutlets. Establishes deep into the soil profile and forms persistent patches that are difficult to eradicate completely.
Growing Information
Origin Region
Cosmopolitan distribution; native to North America and Eurasia, found globally in tropical and temperate regions
Growth Habit
Rhizomatous with underground tubers (nutlets), spreading rapidly to form dense patches
Sunlight & Water Needs
Thrives in full sun and wet, poorly drained, or frequently overwatered soils. High water requirement, often appearing in low spots or over-irrigated lawns. Prefers moist, sandy or loamy soils with a wide pH range.
Mowing & Maintenance
Grows faster than typical turfgrass, often appearing taller within a day or two after mowing. Responds to regular mowing by spreading laterally. High maintenance required to control infestations, as standard mowing does not eliminate the underground tubers.
Special Characteristics
Poor wear tolerance, highly invasive in turfgrass settings, resistant to many standard broadleaf herbicides because it is a sedge requiring specialized selective herbicides (like halosulfuron). Excellent drought avoidance through underground tubers.
Ecological Information
Often considered a noxious agricultural and turf weed due to its aggressive spreading nature via tubers. Provides minor forage and food source for certain waterfowl and wildlife, but primarily acts as an invasive pest in managed landscapes and agricultural fields.