North America Native Plant

Snake River Wheatgrass

Botanical name: Elymus wawawaiensis

USDA symbol: ELWA2

Life cycle: perennial

Habit: grass

Native status: Native to the lower 48 states  

Snake River Wheatgrass: A Tough Native Grass for Western Gardens If you’re looking for a low-maintenance native grass that can handle whatever Mother Nature throws at it, let me introduce you to Snake River wheatgrass (Elymus wawawaiensis). This hardy perennial grass might not win any beauty contests, but it’s the ...

Snake River Wheatgrass: A Tough Native Grass for Western Gardens

If you’re looking for a low-maintenance native grass that can handle whatever Mother Nature throws at it, let me introduce you to Snake River wheatgrass (Elymus wawawaiensis). This hardy perennial grass might not win any beauty contests, but it’s the reliable friend your garden needs – especially if you live in the Pacific Northwest.

What Is Snake River Wheatgrass?

Snake River wheatgrass is a native perennial grass that belongs to the graminoid family – that’s fancy speak for grass and grass-like plants. True to its name, this tough customer hails from the Snake River region, where it has spent centuries perfecting the art of survival in challenging conditions.

As a bunch grass, it grows in neat clumps rather than spreading aggressively like some of its grass cousins. The narrow, blue-green to grayish leaves create an attractive fountain-like appearance, while the upright seed heads add vertical interest to the landscape.

Where Does It Grow Naturally?

This grass is a true native of the American West, specifically calling Idaho, Oregon, and Washington home. It’s perfectly adapted to the unique climate and soil conditions of the Pacific Northwest, making it an excellent choice for gardeners in these states who want to work with nature rather than against it.

Why Plant Snake River Wheatgrass?

Here’s where this unassuming grass really shines:

  • Drought tolerant: Once established, it can handle dry spells like a champ
  • Low maintenance: No need for constant watering, fertilizing, or fussing
  • Erosion control: Those deep roots help hold soil in place on slopes
  • Wildlife habitat: Provides structure and shelter for beneficial insects and small wildlife
  • Authentic to your region: Supporting local ecosystems by planting natives

Growing Conditions and Care

Snake River wheatgrass is wonderfully adaptable, but it does have its preferences. This grass thrives in full sun and well-draining soils – think of its natural habitat along riverbanks and open meadows. It’s classified as facultative upland, which means it usually prefers non-wetland areas but can tolerate some moisture.

The grass is hardy in USDA zones 4-8, making it suitable for most temperate climates. It’s particularly well-suited for:

  • Native plant gardens
  • Xeriscaping projects
  • Restoration landscapes
  • Natural or prairie-style gardens
  • Slope stabilization projects

Planting and Establishment

The best time to establish Snake River wheatgrass is in fall or early spring when natural moisture levels are higher. This gives the grass time to develop its extensive root system before facing summer drought conditions.

Here are some tips for success:

  • Start with seed: This grass is typically grown from seed rather than transplants
  • Prepare the soil: Ensure good drainage – waterlogged soil is this grass’s kryptonite
  • Be patient: Like many native grasses, it may take a season or two to become fully established
  • Water wisely: Provide supplemental water during the first growing season, then gradually reduce as the plant establishes

The Bottom Line

Snake River wheatgrass might not be the showiest plant in your garden, but it’s definitely one of the most dependable. If you’re looking to create a sustainable, low-water landscape that supports local ecosystems, this native grass deserves a spot in your design. It’s proof that sometimes the best garden plants are the ones that have been quietly thriving in your region for centuries – no fuss, no drama, just steady, reliable performance year after year.

Plus, there’s something deeply satisfying about growing a plant that’s perfectly at home in your neck of the woods. Your local wildlife will thank you, your water bill will thank you, and you’ll have more time to enjoy your garden instead of constantly maintaining it.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Great Plains

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Western Mountains, Valleys, and Coast

FACU

Facultative Upland - Plants with this status usually occurs in non-wetlands but may occur in wetlands

Snake River 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

Elymus L. - wildrye

Species

Elymus wawawaiensis J. Carlson & Barkworth - Snake River wheatgrass

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