Yellow Nutsedge
Cyperus esculentus · Perennial sedge, C4 photosynthetic pathway, acts as a warm-season weed
Grass Family
Cyperaceae
Grass Category
Invasive/Weed Grass (Sedge)
Variety / Cultivar
Wild type
Hardiness Zones
USDA Hardiness Zones 3-10, highly adaptable to diverse climates with moderate to high moisture.
About This Grass
Vibrant yellowish-green, upright perennial sedge that grows much faster than surrounding turfgrass, often standing out prominently. Has a distinctly triangular stem when rolled between fingers. Reaches heights up to 1-2 feet if left unmowed. Forms dense, clumping colonies in wet areas.
Blade Characteristics
Leaves are grass-like, glossy, yellowish-green to bright green, 3-10 mm wide (medium to coarse), folded in the bud with a V-shaped cross-section. Tips are pointed. Leaves originate from the base in ranks of three (tristichous).
Root System
Fibrous root system featuring underground, scaly rhizomes that terminate in small, edible tubers called nutlets. Moderate depth, highly persistent, rapid establishment in saturated soils.
Growing Information
Origin Region
Cosmopolitan distribution, native to North America and Eurasia, found worldwide in moist soils
Growth Habit
Rhizomatous and stoloniferous, forming dense patches via underground tubers (nutlets)
Sunlight & Water Needs
Thrives in full sun to partial shade. Prefers wet, poorly drained soils, over-watered lawns, and compacted areas, but once established can survive moderate dry spells via its underground tubers.
Mowing & Maintenance
Mowing frequently decapitates the plant, but it grows back rapidly due to stored energy in the nutlets, often outpacing normal turfgrass within 24-48 hours. Hand pulling is difficult because snapping the stem leaves the tubers behind.
Special Characteristics
Low wear tolerance, poor drought recovery (dormancy via tubers), highly resistant to standard selective broadleaf herbicides (requires specialized sedge hammer/sulfentrazone treatments), highly invasive in turf settings.
Ecological Information
Often considered a troublesome agricultural weed and turf weed. Provides limited food for some waterfowl and small mammals via its tubers, but primarily acts as an aggressive competitor in damp landscapes.