Photo by Melody

PlantFiles: Species Orchid, Kaki-ran, Persimmon Orchid, Helleborine, Thunberg's Epipactis
Epipactis thunbergii

Family: Orchidaceae (or-kid-AY-see-ee) (Info)
Genus: Epipactis (ep-ih-PAK-tiss) (Info)
Species: thunbergii (thun-BERG-ee-eye) (Info)

Synonym:Amesia thunbergii
Synonym:Arthrochilium thunbergii
Synonym:Helleborine chinensis
Synonym:Helleborine thunbergii
Synonym:Limodorum thunbergii

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18-24 in. (45-60 cm)

15-18 in. (38-45 cm)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)

Sun Exposure:
Sun to Partial Shade
Light Shade


Bloom Color:
Gold (Yellow-Orange)

Bloom Time:
Late Spring/Early Summer
Mid Summer


Other details:
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral Aspinwalln On Oct 1, 2011, Aspinwalln from Glendale, MO wrote:

Epipactis thunbergii does flower nicely, ie 5-10 flowers per plant and does set abundant seed if cross pollinated by hand. The only trouble is that I have not been able to germinate the seed.
This species is fully hardy in St. Louis


This plant has been said to grow in the following regions:

Saint Louis, Missouri
Bay Village, Ohio

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