Caulophyllum thalictroides
Blue Cohosh

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Butterfly FriendlyDeer ResistantPart ShadeFall Color
Blue Cohosh
Caulophyllum thalictroides

Perfect for a shady or partly shaded woodland garden, this selection's delicate, yellow-green flowers appear in late April against smoky blue, lacy foliage. Blue Cohosh prefers rich, moist soils, is maintenance free and loaded with clusters of deep blue berries in late summer and fall. Looks terrific when planted with lower growing wildflowers, ferns, and sedges.


Provides both pollen and nectar for beneficial insects
Birds relish the fruits and help to disperse the seed
Deep blue grape-like fruits add another season of interest
Lacy, blue-green foliage is very attractive into fall
A real star of the shade garden

Native Range

Blue Cohosh is found in rich, moist, shady forests from Manitoba south to Oklahoma east to the Atlantic Ocean.

Interesting Facts

Native Americans called Blue Cohash 'Squaw Root' or 'Papoose Root' for it's widespread medicinal use for women.

The foliage resembles meadow rues (Thalictrum), hence the species name.


Plant in partial or full shade with moist, humus rich soil. Mulch in winter and water if nessisary to keep the soil moist. Once established do not disturb. Propagate by dividing Caulophyllum in the spring or at the start of autumn.

Mature Size: 1-2ft. Tall x 1-2ft. Wide

Hardiness Zone: 3-8

Sun Exposure: Part Shade

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