I finally saw Blue Cohosh for myself at the Mount Cuba Center in northern Delaware, as they have some excellent groups of it in their woodsy landscapes. I don't know of it being sold at conventional garden centers but some native plant nurseries sell it as seed or plants. I have not really seen it in the wild myself so far; so despite a good sized range, it is not found everywhere commonly. It is a member of the Barberry Family that has a good sized native range in eastern North America from southeast Canada & Maine down to northern Alabama to northern Arkansas then up through Minnesota a little into Canada and then back eastward again. It has pretty meadowrue-like foliage and bright blue berries. I believe it has yellow-colored rhizomes so it should spread by those underground root-like stems. It grows in part to light full shade in moist, rich soils. It is a handsome perennial.

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