Leymus Arenarius Glaucous 'Blue Dune'

Blue Lyme Grass

Leymus arenarius ‘Blue Dune’ is a bold, cool-season ornamental grass valued for its striking steel-blue foliage and strong, upright form. Broad, arching leaves emerge silvery-blue in spring, maintain their color through summer, and may take on muted tan tones in fall, while wheat-like flower spikes appear in early summer and mature to a buff color. Its coarse texture and vivid color make it a standout in sunny, dry landscapes.

Type: Perennial ornamental grass

Mature Size:
Width: 3–6 ft (spreading)
Height: 2–3 ft (to 3–4 ft in flower)
(10-year size: spreads by rhizomes to form colonies)

USDA Zones: 4a–9b
Form: Upright, spreading, rhizomatous
Light: Full sun (best color)
Soil: Well-drained soils; tolerates sandy, poor soils
Water: Low; very drought tolerant once established

Wildlife: Provides cover; generally not browsed by deer


Features & Landscape Uses


Striking blue foliage for bold contrast



Strong texture for modern or coastal plantings



Effective for erosion control and massing



Tolerates poor, sandy soils




Care
Very low-maintenance. Plant in full sun and well-drained soil. Spreads aggressively by rhizomes—best used where it has room or contained with barriers. Cut back in late winter to refresh growth. Divide as needed to control spread.

Plant type

Ornamental Grass, Perennial

Height

2-3'

Width

3-6'

Hardiness zones

4–9

Sunlight

Full Sun

Growth rate

Fast

Bloom time

Early Summer, Mid Summer

Leaf color

Sky Blue

Soil

Loamy

Shape

Spreading, Upright

Deer resistant

Yes

Drought tolerant

No