Caulophyllum thalictroides (Blue Cohosh)


Botanical Information

FamilyBerberidaceae
GenusCaulophyllum
Speciesthalictroides
CategoryPerennials, Wildflowers & Weeds
OriginEastern North America.

Details

USDA Hardiness Zone3 - 8
USDA Hardiness Ref.
Canadian Hardiness Zone1a - 7a
Canada Hardiness Ref.
RHS Hardiness ZoneH5 - H7
RHS Hardiness Ref.
Temperature (°C)-40 - (-9)
Temperature (°F)-40 - 15
Height60 cm
Spread30 cm
GrowthFast
Flowering PeriodApril

Description and Growing Information

LandscapeWild or woodland garden.
PropagationPropagate through division in spring or after flowering, or by seed, sown when ripe, in a cold frame.
CultivationDoes best in deep shade, in damp, light, humus-rich soil.
Notable SpecimensJoany’s Woods, West Williams, Middlesex County, Ontario, Canada.
Leaf DescriptionLeaves are 3-lobed to base, with 3-lobed, pointed leaflets.
Flower DescriptionFlowers are yellow, 12 mm across, and appear before leaf is fully developed.
Fruit DescriptionSeeds grow to 1.2 cm in diameter, with a rich blue coat.

Photographs