Plant Problem Diagnostic
How to Identify and Control Yellow Nutsedge
The short answer
Yellow nutsedge (Cyperus esculentus) is a perennial sedge, not a true grass, distinguished by a triangular, solid stem with glossy, grass-like leaves that often grow taller than surrounding turf. Its leaves are yellow-green and it grows faster than lawn grass in summer heat.
It reproduces mainly by small underground tubers called nutlets, and a single plant can produce several hundred in one summer. Because those tubers resprout, the key to physical control is to remove young plants in late spring and early summer before new tubers form.
How to identify yellow nutsedge
- Triangular, solid stem (roll it between your fingers to feel the three sides)
- Glossy, yellow-green grass-like leaves from the base
- Grows faster and taller than surrounding lawn in summer
- Perennial; spreads by underground tubers (nutlets) on rhizomes
Cultural and physical control
Pull or dig young plants early, before the weed begins forming new tubers in late June and early July, and repeat as new shoots emerge to gradually drain the tuber's reserves. Improve drainage in chronically wet spots that favor nutsedge, and keep a dense, competitive turf.
When to escalate
Yellow nutsedge is difficult to control because of its persistent tubers, so established stands may need an integrated program. For chemical control options and timing suited to your area, consult your county Extension office.
→ For chemical control options, contact your local county Extension office; nutsedge management usually combines cultural, mechanical, and other methods.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- Penn State Extension — Yellow Nutsedge — Perennial sedge, triangular solid stem, grass-like leaves; reproduces by underground tubers (nutlets), begins forming new tubers late June/early July, remove before then