How much sun does Horrid Thistle need?

Horrid Thistle grows best in full sun conditions.

When does Horrid Thistle bloom?

Horrid Thistle blooms in June, July, and August.

Where is Horrid Thistle native?

Horrid Thistle (Cirsium horridulum) is native to AL, AR, CT, DE and 18 more states, per vouchered herbarium specimen records and regional native plant society lists.

What pollinators does Horrid Thistle attract?

Horrid Thistle draws bees, butterflies, and beetles.

Is Horrid Thistle HOA-friendly?

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

Horrid Thistle

Name: Pollinator Patch
Author: Pollinator Patch

Cirsium horridulum

Last reviewed: June 2026

Toxicity unknown

Horrid Thistle (Cirsium horridulum) 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

medium

Size

12"–48" H × 12"–24" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, CT, DE and 18 more states

Pollinators

bees, butterflies, beetles

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 437 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

Texas Blackland Prairies East Central Texas Plains Western Gulf Coastal Plain South Central Plains Eastern Temperate Forests Piedmont Northeastern Coastal Zone Middle Atlantic Coastal Plain Northern Piedmont Southeastern Plains Ridge and Valley Mississippi Alluvial Plain Mississippi Valley Loess Plains Southern Coastal Plain Southern Florida Coastal Plain Atlantic Coastal Pine Barrens

Horrid thistle is a spiny native wildflower that produces showy yellow, pink, or purple blooms from summer into early fall. This robust perennial forms clumps of deeply lobed, thorny leaves and can reach up to 4 feet tall when flowering. The plant attracts numerous pollinators but requires careful placement due to its aggressive spines.

In an HOA neighborhood

Horrid 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.

Very spiny and can appear aggressive or weedy
Name includes 'horrid' which creates negative perception
May self-seed aggressively in some conditions

Wildlife value

This thistle is exceptionally valuable for pollinators, attracting native bees, butterflies, and beneficial beetles to its nectar-rich flowers. The seeds also provide food for goldfinches and other songbirds in late summer and fall.

Common questions

How much sun does Horrid Thistle need?: Horrid Thistle grows best in full sun conditions.
When does Horrid Thistle bloom?: Horrid Thistle blooms in June, July, and August.
Where is Horrid Thistle native?: Horrid Thistle (Cirsium horridulum) is native to AL, AR, CT, DE and 18 more states, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Horrid Thistle attract?: Horrid Thistle draws bees, butterflies, and beetles.
Is Horrid Thistle HOA-friendly?: Horrid 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 vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

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

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