Slender Hairgrass
Deschampsia elongata
Last reviewed: June 2026
Slender Hairgrass (Deschampsia elongata) is a native grass found across western and select eastern US states, blooming June through August in sunny to partially shaded locations.
The USDA PLANTS Database (opens in new tab) does not flag Slender Hairgrass as toxic to livestock.
Light
part sun
Water
low
Size
12"–40" H × 8"–24" W
Bloom
Jun, Jul, Aug
Native to
AZ, CA, CO, ID and 10 more states
Browse plants for this ecoregion
Slender hairgrass is a fine-textured native bunch grass that forms neat clumps with delicate, airy seed heads in summer. It stays green year-round and tolerates drought once established, making it a low-maintenance choice for natural landscapes. The wispy flower clusters add movement and texture to plantings from June through August.
Growing Slender Hairgrass
Grow Slender Hairgrass in part sun and low water. Mature plants reach 12 to 40 inches tall and spread 8 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Slender Hairgrass is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
Wildlife value
This native grass provides seeds for songbirds and small mammals in late summer and fall. The clumping growth habit offers nesting material and shelter for ground-dwelling wildlife.
Common questions
- Where does Slender Hairgrass naturally grow?
- Deschampsia elongata is native to 14 US states including Arizona, California, Colorado, Idaho, Massachusetts, Maine, Montana, New Mexico, Nevada, Oregon, South Carolina, Utah, Washington, and Wyoming.
- When does Slender Hairgrass bloom?
- This native grass produces flowers from June through August during the summer months.
- What growing conditions does Slender Hairgrass prefer?
- Deschampsia elongata tolerates partial sun conditions and requires low water, making it suitable for dry sites and xeriscaping applications.
- Is Slender Hairgrass toxic to livestock?
- The USDA PLANTS Database does not flag Slender Hairgrass as toxic to livestock.
- Is Slender Hairgrass HOA-friendly?
- Slender Hairgrass is generally an HOA-friendly choice in the right placement, with low maintenance.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Slender Hairgrass? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz