Elymus arenarius – Blue Lyme Grass, Invasive Spreading Grass

Blue Lyme Grass (Elymus arenarius)

Elymus arenarius (Synonym: Leymus arenarius) has densely tufted, spreading clumps of strap-like, flowing foliage. Pale blue-gray leaves arch loosely. In summer, it produces stiff, upright, blue-gray spikes of flowers that turn buff.

Growing Conditions & Care

This grass is tough anywhere, but it is invasive and needs curbing in spring. Grow in well-drained soil. Cut down in autumn.

Propagation

Divide from mid-spring to early autumn.

Potential Problems

Ergot, root rot, and leaf spots can occur.

Quick Reference

• Height: 3–6 ft.
• Light: Full sun only
• Moisture: Dry to medium
• Maintenance: Moderate
• Bloom Time: Summer
• Flower Color: Blue, Brown
• Foliage Color: Colorful/Burgundy
• Uses: Beds, borders
• Type: Grass