When does prairie agoseris bloom?

Prairie agoseris blooms from May through August, sending up leafless stalks topped with a single yellow, dandelion-like flower head.

What pollinators visit prairie agoseris?

Bees and butterflies are the main visitors, attracted to the bright yellow flower heads for nectar and pollen.

How much water does prairie agoseris need?

It is a low-water plant that prefers dry, well-drained soil and does not tolerate frequent watering or heavy, wet ground.

What growing conditions suit prairie agoseris best?

Full sun and open, dry sites such as prairies, sagebrush steppe, and rocky mountain meadows suit this plant best.

Is Prairie Agoseris toxic to livestock?

The USDA PLANTS Database does not flag Prairie Agoseris as toxic to livestock.

Is Prairie Agoseris HOA-friendly?

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

Prairie Agoseris

Name: Pollinator Patch
Author: Pollinator Patch

Agoseris glauca

Last reviewed: September 2026

Prairie agoseris is a low-growing forb with yellow, dandelion-like flowers that bloom from May through August. It thrives in dry, sunny meadows, sagebrush flats, and mountain grasslands.

Toxicity unknown

Prairie Agoseris (Agoseris glauca) 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 Prairie Agoseris as toxic to livestock.

Light

full sun

Water

low

Size

4"–24" H × 4"–12" W

Bloom

May, Jun, Jul, Aug

Native to

AZ, CA, CO, ID and 11 more states

Pollinators

bees, butterflies

Before you buy

Your city may pay you to plant this

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Browse plants for this ecoregion

Northwestern Forested Mountains Sierra Nevada North American Deserts Central Basin and Range Southern Rockies Arizona/New Mexico Mountains High Plains Southwestern Tablelands Northwestern Glaciated Plains Northwestern Great Plains Northern Glaciated Plains Great Plains Northern Lakes and Forests North Central Hardwood Forests

Prairie agoseris is a compact native wildflower that produces bright yellow dandelion-like blooms from late spring through summer. This low-growing perennial forms neat clumps with narrow leaves and thrives in sunny, dry conditions.

Growing Prairie Agoseris

Grow Prairie Agoseris in full sun and low water. Mature plants reach 4 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

Prairie Agoseris 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.

Flowers closely resemble dandelions which many HOAs consider weeds
May be mistaken for undesirable wildflowers by neighbors
Leaf retention unknown creates uncertainty about winter appearance

Wildlife value

The cheerful yellow flowers attract native bees and butterflies throughout the long blooming season. Seeds provide food for small birds and wildlife.

Common questions

When does prairie agoseris bloom?: Prairie agoseris blooms from May through August, sending up leafless stalks topped with a single yellow, dandelion-like flower head.
What pollinators visit prairie agoseris?: Bees and butterflies are the main visitors, attracted to the bright yellow flower heads for nectar and pollen.
How much water does prairie agoseris need?: It is a low-water plant that prefers dry, well-drained soil and does not tolerate frequent watering or heavy, wet ground.
What growing conditions suit prairie agoseris best?: Full sun and open, dry sites such as prairies, sagebrush steppe, and rocky mountain meadows suit this plant best.
Is Prairie Agoseris toxic to livestock?: The USDA PLANTS Database does not flag Prairie Agoseris as toxic to livestock.
Is Prairie Agoseris HOA-friendly?: Prairie Agoseris 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.

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.

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