Blue Dune Lyme Grass
Leymus arenarius 'Blue Dune'
Essentials
At a Glance
Plant Type
Grass
Height
36 inches
Width
36 inches
Light
Full Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low
Humidity
Tolerates low humidity
Lifespan
Perennial grass
Native To
Coasts of Europe (species)
Toxicity
Non-toxic
The Story
Plant Bio
Leymus arenarius is a vigorous, rhizomatous perennial grass native to the coastlines of Europe, known for its tough nature and striking blue-gray foliage. It is an aggressive spreader. 'Blue Dune' is a cultivar selected for its particularly intense, metallic-blue foliage, making it a dramatic accent plant. Its aggressive spreading habit requires containment.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Select a full sun location with poor, well-drained soil.
- Install a 24-inch deep root barrier if planting in the ground.
- Dig a hole and place the plant inside the barrier.
- Backfill with soil and water to establish.
- Alternatively, plant in a large, sturdy container.
- Cut back foliage to the ground in late winter.
Pro Tip
Always plant this grass within a root barrier or in a large pot to prevent its aggressive rhizomes from taking over the garden.
Keep It Thriving
Care Guide
Do
- Provide full sun and excellent drainage.
- Use a root barrier or plant in a container.
- Cut back foliage annually for a fresh look.
Don't
- Do not plant in a mixed border without containment.
- Do not use rich, fertile soil, which encourages rampant growth.
- Do not overwater.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Blue Dune Lyme Grass questions
What zones can Blue Dune Lyme Grass grow in?
Blue Dune Lyme Grass is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Dune Lyme Grass deer resistant?
Yes — Blue Dune Lyme Grass is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Blue Dune Lyme Grass bloom?
Blue Dune Lyme Grass typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Blue Dune Lyme Grass need full sun?
Blue Dune Lyme Grass does best in full sun (6+ hours).
Is Blue Dune Lyme Grass drought tolerant?
Yes — once established (usually after the first full season), Blue Dune Lyme Grass handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Blue Dune Lyme Grass with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
