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North America Native Plant

Fendler Threeawn

Fendler Threeawn: A Hardy Native Grass for Low-Maintenance Landscapes Meet Fendler threeawn (Aristida purpurea var. longiseta), a tough-as-nails native grass that’s quietly making a name for itself in sustainable landscaping circles. While it might not win any beauty contests, this unassuming perennial grass brings some serious practical benefits to gardens ...

Fendler Threeawn: A Hardy Native Grass for Low-Maintenance Landscapes

Meet Fendler threeawn (Aristida purpurea var. longiseta), a tough-as-nails native grass that’s quietly making a name for itself in sustainable landscaping circles. While it might not win any beauty contests, this unassuming perennial grass brings some serious practical benefits to gardens across North America.

What Makes Fendler Threeawn Special?

Fendler threeawn is a true North American native, naturally occurring across an impressive range from Canada down through much of the western and central United States. This bunch-forming perennial grass grows in a classic upright, erect pattern, reaching about 1.4 feet tall at maturity. Don’t expect flashy flowers – this grass produces modest yellow blooms in early spring that aren’t particularly showy, followed by brown seeds.

The real star of the show is its fine to medium-textured green foliage that provides gentle movement and subtle texture in the landscape. While the flowers and seeds won’t stop traffic, the overall effect is pleasantly naturalistic.

Where Does It Grow?

This grass has one of the most extensive native ranges you’ll find, growing naturally in Alberta, British Columbia, Manitoba, Saskatchewan, and across numerous U.S. states including Arizona, California, Colorado, Idaho, Iowa, Kansas, Louisiana, Minnesota, Montana, Nebraska, Nevada, New Mexico, North Carolina, North Dakota, Oklahoma, Oregon, South Carolina, South Dakota, Texas, Utah, Washington, and Wyoming.

Why Choose Fendler Threeawn for Your Garden?

Here’s where this grass really shines – it’s incredibly low-maintenance and drought-tolerant. If you’re looking for a plant that can handle tough conditions without constant babying, Fendler threeawn might be your new best friend.

Key benefits include:

  • Excellent drought tolerance once established
  • Rapid growth rate for quick establishment
  • Low fertility requirements (actually prefers poor soils)
  • Native status supports local ecosystems
  • Minimal maintenance needs
  • Good for erosion control on slopes

Perfect Garden Settings

Fendler threeawn works best in:

  • Xeriscapes and drought-tolerant gardens
  • Prairie restoration projects
  • Naturalistic landscapes
  • Native plant gardens
  • Low-maintenance commercial landscapes
  • Erosion control areas

This isn’t the grass for formal lawns or high-traffic areas, but it’s perfect for creating that relaxed, natural look that’s so popular in sustainable landscaping.

Growing Conditions

Fendler threeawn is refreshingly easy to please:

  • Sunlight: Full sun only – this grass is shade intolerant
  • Soil: Prefers coarse to medium-textured, well-draining soils
  • Water: Low water needs once established
  • pH: Adaptable to slightly acidic to neutral soils (5.5-7.5)
  • Climate: Hardy in USDA zones 3-9, handles temperatures down to -33°F
  • Precipitation: Thrives with just 2-15 inches of annual rainfall

Planting and Care Tips

Growing Fendler threeawn is wonderfully straightforward:

Starting from seed: This grass is typically propagated by seed, with about 500,000 seeds per pound. Seeds have moderate spreading ability and medium seedling vigor. Spring is the best time for seeding.

Establishment: While growth is rapid once conditions are right, be patient during the first season. The grass needs at least 165 frost-free days and may take time to develop its extensive root system (which can reach 12+ inches deep).

Ongoing care: Here’s the best part – there’s very little to do! This grass has slow regrowth after cutting, moderate fire tolerance, and no known pest or disease issues. Avoid overwatering and over-fertilizing, as this grass actually prefers lean conditions.

Wildlife and Ecosystem Benefits

While Fendler threeawn may not be a pollinator magnet (it’s wind-pollinated), it provides valuable habitat structure and nesting materials for birds and small mammals. Its seeds can provide food for wildlife, and its presence helps support the broader native plant community.

Is Fendler Threeawn Right for You?

Consider this grass if you want a low-maintenance, drought-tolerant native that can handle tough conditions with minimal input. It’s perfect for gardeners who appreciate subtle beauty and prioritize sustainability over showiness.

Skip it if you’re looking for a lawn substitute, need something for shady areas, or want dramatic seasonal color and texture changes. This is definitely a quiet beauty rather than a garden star.

With its impressive native range, drought tolerance, and minimal care requirements, Fendler threeawn offers a practical way to create sustainable landscapes that work with nature rather than against it. Sometimes the most valuable plants are the ones that simply do their job well without making a fuss about it.

How

Fendler Threeawn

Grows

Growing season

Fall, Winter and Spring

Lifespan

Moderate

Growth form & shape

Bunch and Erect

Growth rate

Rapid

Height at 20 years
Maximum height

1.4

Foliage color

Green

Summer foliage density

Moderate

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

Fendler Threeawn

Growing Conditions

Adapted to Coarse Soil

Yes

Adapted to Medium Soil

Yes

Adapted to Fine Soil

No

Anaerobic tolerance

None

CaCO₃ tolerance

Low

Cold Stratification

No

Drought tolerance

High

Nutrient requirement

Low

Fire tolerance

Medium

Frost-free days minimum

165

Hedge tolerance

None

Moisture requirement

Low

pH range

5.5 to 7.5

Plants per acre
Precipitation range (in)

2 to 15

Min root depth (in)

12

Salt tolerance

Low

Shade tolerance

Intolerant

Min temperature (F)

-33

Cultivating

Fendler Threeawn

Flowering season

Early Spring

Commercial availability

Contracting Only

Fruit/seed abundance

High

Fruit/seed season

Spring to Spring

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

500000

Seed spread rate

Moderate

Seedling vigor

Medium

Small grain

No

Vegetative spread rate

None

Fendler Threeawn

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

Aristida L. - threeawn

Species

Aristida purpurea Nutt. - purple threeawn

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