North America Native Plant

Beardless Wheatgrass

Botanical name: Pseudoroegneria spicata inermis

USDA symbol: PSSPI

Life cycle: perennial

Habit: grass

Native status: Native to Canada ⚘ Native to the lower 48 states  

Synonyms: Agropyron inerme (Scribn. & J.G. Sm.) Rydb. (AGIN5)  ⚘  Agropyron spicatum Pursh var. inerme (Scribn. & J.G. Sm.) A. Heller (AGSPI)   

Beardless Wheatgrass: A Hardy Native Grass for Water-Wise Gardens If you’re looking to add authentic prairie character to your landscape while cutting down on water bills, beardless wheatgrass (Pseudoroegneria spicata inermis) might just become your new best friend. This unassuming but resilient native grass has been quietly holding down western ...

Beardless Wheatgrass: A Hardy Native Grass for Water-Wise Gardens

If you’re looking to add authentic prairie character to your landscape while cutting down on water bills, beardless wheatgrass (Pseudoroegneria spicata inermis) might just become your new best friend. This unassuming but resilient native grass has been quietly holding down western soils for centuries, and it’s ready to do the same for your garden.

What Is Beardless Wheatgrass?

Beardless wheatgrass is a perennial bunch grass native to both Canada and the lower 48 states. You might also see it listed under its former scientific names, including Agropyron inerme or Agropyron spicatum var. inerme, but don’t let the name changes fool you – it’s the same tough, reliable grass.

As a graminoid (that’s botanist-speak for grass-like plant), this species forms neat clumps rather than spreading aggressively like some of its relatives. The beardless part of its name refers to the lack of awns (bristle-like appendages) on its seed heads, giving it a cleaner, less spiky appearance than other wheatgrasses.

Where Does It Grow?

This adaptable native calls home to an impressive swath of western North America, thriving in Alberta, British Columbia, Colorado, Idaho, Montana, Nebraska, Nevada, New Mexico, Oregon, Texas, Utah, Washington, and Wyoming. That’s quite a range for any plant, speaking to its remarkable adaptability.

Why Choose Beardless Wheatgrass for Your Garden?

Here’s where this grass really shines – it’s practically built for tough love gardening:

  • Drought Champion: Once established, it laughs in the face of dry spells
  • Low Maintenance: No weekly watering schedules or fussy fertilizing needed
  • Erosion Fighter: Those deep roots make it excellent for slopes and problem areas
  • Wildlife Friendly: Provides habitat structure and nesting material for birds and beneficial insects
  • Authentic Beauty: Adds genuine prairie character with its fine-textured, bluish-green foliage

Perfect Garden Matches

Beardless wheatgrass is a natural fit for:

  • Xeriscapes and drought-tolerant landscapes
  • Native plant and prairie-style gardens
  • Naturalistic landscapes and meadow plantings
  • Erosion control projects
  • Low-water ornamental grass displays

Growing Conditions and Care

The beauty of beardless wheatgrass lies in its simplicity. This grass thrives in USDA hardiness zones 3-8, making it suitable for most temperate climates. It performs best in full sun and well-drained soils, though it’s fairly adaptable to different soil types as long as they don’t stay soggy.

Here’s your care playbook:

  • Sunlight: Full sun (6+ hours daily)
  • Soil: Well-drained; tolerates poor soils
  • Water: Drought tolerant once established; minimal watering needed
  • Maintenance: Cut back in late winter if desired; otherwise, let it be

Planting Tips for Success

The best time to establish beardless wheatgrass is through fall seeding, which allows the seeds to experience natural winter stratification. If you’re starting from seed, scatter them over prepared soil and lightly rake them in – they don’t need to be buried deeply.

Be patient during the first year as the grass focuses on developing its extensive root system. Once established (typically by the second growing season), you’ll have a virtually maintenance-free addition to your landscape that can handle whatever Mother Nature throws its way.

The Bottom Line

Beardless wheatgrass might not win any flashiness contests, but it delivers exactly what many modern gardeners crave: authentic native beauty with minimal fuss. Whether you’re creating a prairie-inspired landscape, tackling a challenging slope, or simply wanting to reduce your garden’s water demands, this resilient grass has proven its worth across centuries and countless gardens. Sometimes the most reliable plants are the ones that have been quietly doing their job all along.

How

Beardless Wheatgrass

Grows

Growing season

Spring, Summer, Fall

Lifespan

Moderate

Growth form & shape

Bunch and Erect

Growth rate

Moderate

Height at 20 years
Maximum height

2.5

Foliage color

Green

Summer foliage density

Dense

Winter foliage density

Porous

Foliage retention

No

Flowering

No

Flower color

Yellow

Fruit/seeds

No

Fruit/seed color

Brown

Allelopath

No

Nitrogen fixing

None

Toxic

None

C:N Ratio

Medium

Fire Resistant

No

Foliage Texture

Medium

Low-growing Grass

No

Resproutability

No

Coppice Ability

No

Bloat

None

Beardless Wheatgrass

Growing Conditions

Adapted to Coarse Soil

Yes

Adapted to Medium Soil

Yes

Adapted to Fine Soil

Yes

Anaerobic tolerance

Low

CaCO₃ tolerance

High

Cold Stratification

No

Drought tolerance

High

Nutrient requirement

Low

Fire tolerance

Low

Frost-free days minimum

90

Hedge tolerance

None

Moisture requirement

Low

pH range

6.4 to 8.4

Plants per acre
Precipitation range (in)

10 to 35

Min root depth (in)

10

Salt tolerance

Low

Shade tolerance

Intolerant

Min temperature (F)

-36

Cultivating

Beardless Wheatgrass

Flowering season

Early Spring

Commercial availability

Routinely Available

Fruit/seed abundance

High

Fruit/seed season

Summer to Summer

Fruit/seed persistence

No

Propagated by bare root

No

Propagated by bulb

No

Propagated by container

No

Propagated by corm

No

Propagated by cuttings

No

Propagated by seed

Yes

Propagated by sod

No

Propagated by sprigs

No

Propagated by tubers

No

Seed per pound

145000

Seed spread rate

Slow

Seedling vigor

Medium

Small grain

No

Vegetative spread rate

None

Beardless Wheatgrass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Pseudoroegneria (Nevski) Á. Löve - wheatgrass

Species

Pseudoroegneria spicata (Pursh) Á. Löve - bluebunch wheatgrass

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA