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Blue Wild Rye

Elymus glaucus

Also listed as Clinelymus glaucus, Elymus americanus

Also known as Western Wild Rye, Smooth Wild Rye, Common Western Wild Rye

grass☀️ full sun💧 low water❄ Hardy: Zone 3a – Zone 10b

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A native perennial bunch grass with fine blue-gray foliage that forms a neat mound. It sends up tall, slender seed heads in summer and is highly drought-tolerant once established.

Why grow it

Blue wild rye establishes quickly in well-drained, low-fertility soils, which makes it useful for erosion control and slope stabilization. Its fine blue-gray texture contrasts with coarser native grasses, and it needs little fertilizer or supplemental water once established.

Watch out for

It can be slow to fill bare ground in the first season and needs steady moisture while establishing. It may self-sow readily, so smaller plantings may need seedlings thinned, and it can be outcompeted by vigorous perennials in amended or irrigated beds.

Overview

Form
bunch grass
Growth Rate
moderate
Size
1.5–3.3′ tall × 1–2′ wide
Dormancy
deciduous
Family
Poaceae
biomass/mulcherosion control

Native to the United States

Native Range

Western North America, California to British Columbia

Native to: California, Oregon, Washington

Seasonality

Season of Interest

SpringSummerFall

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Companion Planting

Plants well with