Blue Cohosh, Papooseroot

Caulophyllum thalictroides

Family
Berberidaceae (bear-ber-id-AY-see-ee)
Genus
Caulophyllum (kaw-loh-FIL-um)
Species
thalictroides (thal-ik-TROY-deez)
Synonym
Sun Exposure
Light Shade
Foliage
Herbaceous
Height
18-24 in. (45-60 cm)
Spacing
12-15 in. (30-38 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
Danger
N/A
Bloom Color
Green
Chartreuse (yellow-green)
Bloom Time
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Cary, Illinois

Calvert City, Kentucky

Bridgewater, Massachusetts

Panama, New York

Elizabeth City, North Carolina

Bowling Green, Ohio

Cincinnati, Ohio

Mc Minnville, Tennessee

Viola, Tennessee

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Gardener's Notes:

1
positive
1
neutral
0
negative
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P
Wildomar, CA | February 2010 | neutral

Used to induce labor. DO NOT ingest if pregnant unless certified health practitioner is trying to induce contractions.

G
Bridgewater, MA (Zone 6b) | June 2007 | positive

It's not uncommon to see this plant for sale (in capsulated form of course) at a drug store as a remedy for women's reproductive problem...Read More

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