When does bottlebrush squirreltail bloom?

Elymus elymoides generally blooms from May through July, sending up bristly, awned seed heads typical of the species.

How much water does bottlebrush squirreltail need?

This grass is adapted to low moisture conditions and does not need supplemental watering once established, making it a good fit for dry rangeland and desert soils.

What growing conditions does bottlebrush squirreltail prefer?

It grows best in full sun with well-drained soil, and it tolerates the hot, dry summers typical of high desert and open rangeland sites.

What does bottlebrush squirreltail look like?

It is a perennial bunchgrass with narrow green leaves and stiff, bristly seed heads that give the plant its bottlebrush appearance in late spring and summer.

Is Bottlebrush Squirreltail toxic to livestock?

The USDA PLANTS Database does not flag Bottlebrush Squirreltail as toxic to livestock.

Is Bottlebrush Squirreltail HOA-friendly?

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

Bottlebrush Squirreltail

Name: Pollinator Patch
Author: Pollinator Patch

Elymus elymoides

Last reviewed: September 2026

Elymus elymoides, or bottlebrush squirreltail, is a low bunchgrass that does best in full sun and dry, well-drained soil. It blooms from May through July and is common in arid rangeland and high desert areas across the western United States.

Toxicity unknown

Bottlebrush Squirreltail (Elymus elymoides) 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 Bottlebrush Squirreltail as toxic to livestock.

Light

full sun

Water

low

Size

12"–24" H × 6"–12" W

Bloom

May, Jun, Jul

Native to

AZ, CA, CO, ID and 13 more states

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Bottlebrush squirreltail is a small bunch grass with distinctive bristly seed heads that resemble bottle brushes. This drought-tolerant native forms compact clumps and produces its characteristic fuzzy flower spikes in late spring through summer.

Growing Bottlebrush Squirreltail

Grow Bottlebrush Squirreltail in full sun and low water. Mature plants reach 12 to 24 inches tall and spread 6 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Bottlebrush Squirreltail 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.

Wild, unmanicured appearance
Seed heads can look messy or weedy
May be perceived as unmaintained lawn

Wildlife value

The seeds provide food for birds and small mammals. The grass structure offers nesting material and shelter for beneficial insects.

Common questions

When does bottlebrush squirreltail bloom?: Elymus elymoides generally blooms from May through July, sending up bristly, awned seed heads typical of the species.
How much water does bottlebrush squirreltail need?: This grass is adapted to low moisture conditions and does not need supplemental watering once established, making it a good fit for dry rangeland and desert soils.
What growing conditions does bottlebrush squirreltail prefer?: It grows best in full sun with well-drained soil, and it tolerates the hot, dry summers typical of high desert and open rangeland sites.
What does bottlebrush squirreltail look like?: It is a perennial bunchgrass with narrow green leaves and stiff, bristly seed heads that give the plant its bottlebrush appearance in late spring and summer.
Is Bottlebrush Squirreltail toxic to livestock?: The USDA PLANTS Database does not flag Bottlebrush Squirreltail as toxic to livestock.
Is Bottlebrush Squirreltail HOA-friendly?: Bottlebrush Squirreltail takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

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.

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