Goldthread

Coptistrifolia

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Coptis (kop-tiss)
Species
trifolia (try-FOH-lee-a)
Synonym
Sun Exposure
Partial to Full Shade
Foliage
Textured
Height
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
USDA Zone 2a: to -45.5 °C (-50 °F)
USDA Zone 2b: to -42.7 °C (-45 °F)
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
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
Parts of plant are poisonous if ingested
Bloom Color
White/Near White
Bloom Time
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
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; germinate in a damp paper towel
Seed Collecting
Seed does not store well; sow as soon as possible
Regional

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

Brookeville, Maryland

Saint Helen, Michigan

West Branch, Michigan

Featured Videos

Gardener's Notes:

1
positive
1
neutral
0
negative
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S
Louisville, KY (Zone 6b) | February 2015 | positive

A low growing circumboreal wildflower native to subarctic regions of Greenland, North America, and Asia and into the interior of NA along...Read More

S
Oklahoma City, OK (Zone 7a) | August 2002 | neutral

A yellow dye can be extracted from the rhizome.

trifolia, from the Latin, "three leaves"

Common Name, from...Read More

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(Cryptophasa sp.)
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(Bucanetes githagineus)
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(Cryptophasa sp.)
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(Bucanetes githagineus)