American Dune Grass
Leymus mollis
Last reviewed: September 2026
American Dune Grass (Leymus mollis) is a perennial grass native to CA, IL, MA, ME and 6 more states. It blooms in June, July, and August. It reads as an intentional, HOA-friendly planting in the right spot.
Toxicity unknown
American Dune Grass (Leymus mollis) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag American Dune Grass as toxic to livestock.
Light
full sun
Water
low
Size
24"–48" H × 12"–24" W
Bloom
Jun, Jul, Aug
Native to
CA, IL, MA, ME and 6 more states
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 459 programs across 44 states, each with a link to the provider and the date we last checked it.
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Browse plants for this ecoregion
American dune grass is a native coastal grass that forms upright clumps with blue-green foliage and attractive seed heads in summer. This drought-tolerant perennial thrives in sandy soils and windy conditions, making it excellent for challenging sites. It provides year-round structure and movement in the landscape.
Growing American Dune Grass
Grow American Dune Grass in full sun and low water. Mature plants reach 24 to 48 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
American Dune Grass is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.
Works well in: mid zone, street edge.
- May spread aggressively in ideal conditions
- Can look somewhat wild or unkempt to traditional tastes
Wildlife value
The seed heads provide food for songbirds and small mammals in late summer and fall. As a native grass, it offers nesting material and habitat for beneficial insects.
Common questions
- How much sun does American Dune Grass need?
- American Dune Grass grows best in full sun conditions.
- When does American Dune Grass bloom?
- American Dune Grass blooms in June, July, and August.
- Where is American Dune Grass native?
- American Dune Grass (Leymus mollis) is native to CA, IL, MA, ME and 6 more states, per the World Checklist of Vascular Plants (Kew).
- Is American Dune Grass toxic to livestock?
- The USDA PLANTS Database does not flag American Dune Grass as toxic to livestock.
- Is American Dune Grass HOA-friendly?
- American Dune Grass is generally an HOA-friendly choice in the right placement, with low maintenance.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow American Dune Grass? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.