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Blue Cohosh. A close up of one of the flowers of Caulophyllum thalictroides. A lovely spring perennial of rich deciduous woodlands. Picture and specimen taken by Helen Lowe Metzman. Howard County, Maryland. 00:46, 1 July 2017 (UTC)00:46, 1

Photo: USGS Bee Inventory and Monitoring Lab from Beltsville, Maryland, USA (Public domain), via Wikimedia Commons

Fruit & ediblemoderate water

Blue Cohosh

Caulophyllum thalictroides

Blue Cohosh (Caulophyllum thalictroides) is a landscape plant valued for its form and structure as much as its bloom. It reaches roughly 2.5 ft at maturity and blooms in mid summer. Match it to full sun to part shade and water on a normal schedule until it is established. 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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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
Mature heightAbout 2.5 ft
Watermoderate
Bloom periodMid Summer
Native to the USNot recorded
Toxicitynone

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Questions

Is Blue Cohosh native to the United States?

USDA PLANTS data does not record Blue Cohosh as native to the United States.

What USDA hardiness zone does Blue Cohosh need?

A minimum hardiness zone is not on file for Blue Cohosh yet.