American Beak Grass
Diarrhena americana
Last reviewed: August 2026
Diarrhena americana, or American beak grass, is a clump-forming woodland grass valued for shaded gardens, blooming in summer with slender green seed heads.
Toxicity unknown
American Beak Grass (Diarrhena americana) 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.
Light
part shade
Water
medium
Size
12"–36" H × 12"–24" W
Bloom
N/A
Native to
AL, AR, GA, IA and 17 more states
Before you buy
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American beakgrain is a native woodland grass that forms neat clumps with narrow green leaves. It produces delicate seed heads in late summer and tolerates shade well, making it useful for areas under trees where other grasses struggle.
Growing American Beak Grass
Grow American Beak Grass in part shade and medium water. Mature plants reach 12 to 36 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 Beak Grass is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, mid zone.
Wildlife value
This grass provides seed for birds and nesting material for small wildlife. Its clumping growth habit offers shelter for beneficial insects.
Common questions
- When does American beak grass bloom?
- American beak grass typically flowers from June through August, producing narrow, sparse panicles that are easy to overlook among the foliage.
- How much light does American beak grass need?
- This grass performs best in part shade, though it can tolerate deeper shade under a tree canopy or slightly more open conditions with dappled sun.
- How much water does American beak grass need?
- It grows well in medium moisture soils and also tolerates drier conditions once established, making it suited to woodland edges and shaded slopes.
- Is American beak grass evergreen?
- No, it is a deciduous perennial grass that dies back to the ground each winter and resprouts from its base in spring.
- What does American beak grass look like in a garden setting?
- It forms neat, arching clumps of medium green foliage that add texture to shaded borders and woodland gardens without spreading aggressively.
- Is American Beak Grass HOA-friendly?
- American Beak Grass is generally an HOA-friendly choice in the right placement, with low maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
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 Beak Grass? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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