How much sun does Pasture Thistle need?

Pasture Thistle grows best in full sun conditions.

When does Pasture Thistle bloom?

Pasture Thistle blooms in June, July, and August.

Where is Pasture Thistle native?

Pasture Thistle (Cirsium undulatum) is native to AZ, CA, CO, GA and 21 more states, per the World Checklist of Vascular Plants (Kew).

What pollinators does Pasture Thistle attract?

Pasture Thistle draws bees and butterflies.

Is Pasture Thistle HOA-friendly?

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

Pasture Thistle

Name: Pollinator Patch
Author: Pollinator Patch

Cirsium undulatum

Last reviewed: August 2026

Pasture Thistle (Cirsium undulatum) is a perennial forb native to AZ, CA, CO, GA and 21 more states. It blooms in June, July, and August. The flowers draw bees and butterflies.

Light

full sun

Water

low

Size

12"–36" H × 12"–24" W

Bloom

Jun, Jul, Aug

Native to

AZ, CA, CO, GA and 21 more states

Pollinators

bees, butterflies

Before you buy

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Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 432 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Northwestern Forested Mountains North American Deserts Central Basin and Range Southern Rockies Arizona/New Mexico Mountains Chihuahuan Deserts High Plains Southwestern Tablelands Central Great Plains Great Plains Cross Timbers Edwards Plateau Texas Blackland Prairies Central Irregular Plains Northwestern Glaciated Plains Northwestern Great Plains Northern Glaciated Plains Western Corn Belt Plains Madrean Archipelago

Pasture thistle is a native perennial with deeply lobed leaves and purple flower heads that bloom through summer. This drought-tolerant plant forms compact clumps and goes dormant in winter, leaving behind dried stems and seed heads.

Growing Pasture Thistle

Grow Pasture Thistle in full sun and low 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

Pasture Thistle 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.

Thistle name creates negative perception
Spiny foliage appears aggressive
Winter dormancy looks untidy

Wildlife value

The purple blooms are magnets for bees and butterflies during summer months. Seeds provide food for finches and other small birds in fall.

Common questions

How much sun does Pasture Thistle need?: Pasture Thistle grows best in full sun conditions.
When does Pasture Thistle bloom?: Pasture Thistle blooms in June, July, and August.
Where is Pasture Thistle native?: Pasture Thistle (Cirsium undulatum) is native to AZ, CA, CO, GA and 21 more states, per the World Checklist of Vascular Plants (Kew).
What pollinators does Pasture Thistle attract?: Pasture Thistle draws bees and butterflies.
Is Pasture Thistle HOA-friendly?: Pasture Thistle 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 the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Pasture Thistle? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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