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Cirsium calcareum, seen in Canyonlands National Park, UT, USA, 2025/08/22

Photo: Thiswasnotmyintention (CC BY 4.0), via Wikimedia Commons

Cainville Thistle

Cirsium calcareum

Cainville Thistle (Cirsium calcareum) is a landscape plant valued for its form and structure as much as its bloom. Cainville Thistle is sized and grown for a real yard, not a show bench. Match it to full sun to part shade and water it in for the first season while roots establish. One caveat: like any plant, its published range is a guideline, not a guarantee, for the specific microclimate of your yard. Given a spot that matches its light and water needs, it is a dependable, low-drama addition to the yard.

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Where to buy Cainville Thistle

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Hardiness range

A hardiness zone is not on file for this plant yet, and a ZIP-level fit check is not available for it.

How it does in your yard

HabitNot recorded
Hardiness zoneNot recorded
Native to the USNot recorded
ToxicityNot recorded

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Questions

Is Cainville Thistle native to the United States?

USDA PLANTS data does not record Cainville Thistle as native to the United States.

What USDA hardiness zone does Cainville Thistle need?

A minimum hardiness zone is not on file for Cainville Thistle yet.