How much sun does Seaside Threeawn need?

Seaside Threeawn grows best in full sun conditions.

When does Seaside Threeawn bloom?

Seaside Threeawn blooms in July, August, and September.

Where is Seaside Threeawn native?

Seaside Threeawn (Aristida tuberculosa) is native to AL, CT, DE, FL and 18 more states, per vouchered herbarium specimen records and regional native plant society lists.

Is Seaside Threeawn HOA-friendly?

Seaside Threeawn takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Seaside Threeawn

Name: Pollinator Patch
Author: Pollinator Patch

Aristida tuberculosa

Last reviewed: August 2026

Toxicity unknown

Seaside Threeawn (Aristida tuberculosa) 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

full sun

Water

low

Size

12"–36" H × 4"–12" W

Bloom

Jul, Aug, Sep

Native to

AL, CT, DE, FL and 18 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 452 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Western Corn Belt Plains North Central Hardwood Forests Driftless Area Southeastern Wisconsin Till Plains Central Corn Belt Plains Northeastern Coastal Zone Middle Atlantic Coastal Plain Northern Piedmont Southeastern Plains Interior River Valleys and Hills Southern Coastal Plain Atlantic Coastal Pine Barrens

Beach grass is a fine-textured annual prairie grass that forms narrow, upright clumps. It produces delicate seed heads in late summer and prefers sandy or well-drained soils in full sun locations.

In an HOA neighborhood

Seaside Threeawn takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Annual growth means gaps and bare spots in landscape
Fine texture and seed heads can appear weedy
May self-seed unpredictably creating uneven coverage

Wildlife value

The seeds provide food for small birds and ground-feeding wildlife. As an annual grass, it offers temporary cover and nesting material for small creatures.

Common questions

How much sun does Seaside Threeawn need?: Seaside Threeawn grows best in full sun conditions.
When does Seaside Threeawn bloom?: Seaside Threeawn blooms in July, August, and September.
Where is Seaside Threeawn native?: Seaside Threeawn (Aristida tuberculosa) is native to AL, CT, DE, FL and 18 more states, per vouchered herbarium specimen records and regional native plant society lists.
Is Seaside Threeawn HOA-friendly?: Seaside Threeawn takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from vouchered herbarium specimen records and regional native plant society lists. 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.

See all plant problem guides

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