When does Oneflower Helianthella bloom?

Oneflower Helianthella typically flowers from June through August, producing a single yellow sunflower-like bloom atop each stem.

What pollinators visit Oneflower Helianthella?

Bees and butterflies are the most common visitors to the flowers of Oneflower Helianthella, drawn to its open daisy-like blooms.

How much water does this plant need?

Oneflower Helianthella prefers low moisture conditions once established and does well in dry mountain meadows and sagebrush openings, though it can handle occasional periods of moderate moisture.

How much sun does Oneflower Helianthella need?

This forb grows best in full sun to part sun, conditions typical of open montane meadows and sagebrush steppe where it is commonly found.

What type of plant is Oneflower Helianthella?

It is a herbaceous perennial forb that dies back to the ground each year, sending up new growth and a single flowering stem in spring.

Is Oneflower Helianthella toxic to livestock?

The USDA PLANTS Database does not flag Oneflower Helianthella as toxic to livestock.

Is Oneflower Helianthella HOA-friendly?

Oneflower Helianthella is generally an HOA-friendly choice in the right placement, with low maintenance.

Oneflower Helianthella

Name: Pollinator Patch
Author: Pollinator Patch

Helianthella uniflora

Last reviewed: August 2026

Helianthella uniflora, known as Oneflower Helianthella, is a low water forb that blooms yellow from June through August in mountain meadows and sagebrush slopes of the intermountain west.

Toxicity unknown

Oneflower Helianthella (Helianthella uniflora) 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 Oneflower Helianthella as toxic to livestock.

Light

part sun

Water

low

Size

6"–24" H × 4"–12" W

Bloom

Jun, Jul, Aug

Native to

AZ, CO, ID, MT and 5 more states

Pollinators

bees, butterflies

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Browse plants for this ecoregion

Northwestern Forested Mountains North American Deserts Central Basin and Range Southern Rockies Northwestern Great Plains

Oneflower helianthella is a compact native wildflower that produces bright yellow, daisy-like blooms throughout the summer months. This low-maintenance perennial forms neat clumps and thrives in dry conditions with minimal water once established. Its manageable size and cheerful flowers make it an attractive addition to xeriscaped gardens.

Growing Oneflower Helianthella

Grow Oneflower Helianthella in part sun and low water. Mature plants reach 6 to 24 inches tall and spread 4 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Oneflower Helianthella is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.

Works well in: mid zone, foundation, front yard.

May appear sparse or weedy when not in bloom
Unknown leaf retention could affect winter appearance

Wildlife value

The bright yellow flowers attract native bees and butterflies during the long summer blooming period. Its nectar-rich blooms provide valuable food sources for pollinators from June through August.

Common questions

When does Oneflower Helianthella bloom?: Oneflower Helianthella typically flowers from June through August, producing a single yellow sunflower-like bloom atop each stem.
What pollinators visit Oneflower Helianthella?: Bees and butterflies are the most common visitors to the flowers of Oneflower Helianthella, drawn to its open daisy-like blooms.
How much water does this plant need?: Oneflower Helianthella prefers low moisture conditions once established and does well in dry mountain meadows and sagebrush openings, though it can handle occasional periods of moderate moisture.
How much sun does Oneflower Helianthella need?: This forb grows best in full sun to part sun, conditions typical of open montane meadows and sagebrush steppe where it is commonly found.
What type of plant is Oneflower Helianthella?: It is a herbaceous perennial forb that dies back to the ground each year, sending up new growth and a single flowering stem in spring.
Is Oneflower Helianthella toxic to livestock?: The USDA PLANTS Database does not flag Oneflower Helianthella as toxic to livestock.
Is Oneflower Helianthella HOA-friendly?: Oneflower Helianthella 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

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