North America Non-native Plant

Oatgrass

Botanical name: Avenula

USDA symbol: AVENU

Life cycle: perennial

Habit: grass

Native status: It's either native or not native in Canada âš˜ It's either native or not native in the lower 48 states  

Growing Oatgrass (Avenula): A Graceful Addition to Prairie and Meadow Gardens If you’re looking to add some gentle movement and texture to your garden, oatgrass might just be the perfect ornamental grass for you. This perennial beauty brings a soft, naturalistic charm that works wonderfully in meadow gardens and prairie-style ...

Growing Oatgrass (Avenula): A Graceful Addition to Prairie and Meadow Gardens

If you’re looking to add some gentle movement and texture to your garden, oatgrass might just be the perfect ornamental grass for you. This perennial beauty brings a soft, naturalistic charm that works wonderfully in meadow gardens and prairie-style landscapes.

What Makes Oatgrass Special?

Oatgrass (Avenula) is a delightful bunch grass that forms elegant clumps with fine-textured foliage and delicate, feathery seed heads that dance in the breeze. As a perennial, it comes back year after year, making it a reliable addition to your landscape. The graceful seed heads catch the light beautifully and add wonderful movement to garden beds.

Where Does Oatgrass Grow?

You’ll find oatgrass growing across a wide range of locations in North America, from Canadian provinces like Alberta, British Columbia, Manitoba, Ontario, Quebec, and Saskatchewan, to numerous US states including Colorado, Connecticut, Delaware, Massachusetts, Minnesota, Montana, New Jersey, New Mexico, North Dakota, South Dakota, Vermont, and Wyoming. It even grows in the Yukon and Northwest Territories!

Perfect Garden Settings for Oatgrass

Oatgrass truly shines in naturalistic garden settings. Here are some ideal spots to consider planting it:

  • Prairie and meadow gardens
  • Naturalistic landscape borders
  • Grassland restoration projects
  • Mixed perennial beds for texture contrast
  • Low-maintenance landscape areas

Growing Conditions and Care

One of the best things about oatgrass is how easygoing it is! Here’s what it needs to thrive:

Sunlight: Give it full sun for the best growth and flowering performance.

Soil: Well-drained soils are essential. Once established, oatgrass is quite drought tolerant, making it perfect for low-water gardens.

Hardiness: Generally hardy in USDA zones 3-8, making it suitable for most temperate climates.

Planting and Maintenance Tips

Getting started with oatgrass is straightforward:

  • Plant in spring after the last frost
  • Space plants according to their mature size for proper air circulation
  • Water regularly during the first growing season to help establish roots
  • Once established, minimal watering is needed
  • Cut back the foliage in late winter before new growth begins
  • Divide clumps every 3-4 years to maintain vigor

Wildlife and Garden Benefits

As a grass, oatgrass is wind-pollinated rather than insect-pollinated, so it won’t directly attract bees and butterflies like flowering plants do. However, it provides valuable habitat structure and can offer nesting materials for birds and shelter for beneficial insects.

Should You Plant Oatgrass?

Oatgrass can be a lovely addition to the right garden setting, especially if you’re creating a naturalistic or prairie-style landscape. However, before planting, it’s worth checking whether oatgrass species are truly native to your specific region. If you’re passionate about supporting local ecosystems, consider researching native grass alternatives that are indigenous to your area first.

If you do choose to grow oatgrass, its low-maintenance nature and attractive form make it a rewarding choice for gardeners who appreciate the subtle beauty of ornamental grasses. Just remember to source your plants responsibly and always check local regulations before introducing any new species to your landscape.

Oatgrass

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

Avenula (Dumort.) Dumort. - oatgrass

Species

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