University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Caulophyllum Species: thalictroides Common Name: Blue Cohosh Family: Berberidaceae Order: Ranunculales Native: Eastern North America Habit: Herbaceous Perennial Height: 1 to 3 feet Width: 0.5 to 1 foot Flowering Season: Spring Flower Color: Yellow Propagation: Seed and division Zone: 3-8 Note: This rhizomatous plant has attractive blue-green foliage and clusters of poisonous blue fruits. Blue Cohosh is suitable for woodlands or wild gardens. Prefers partly shady to shady, moist, well-drained, organic-rich soil.