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Hardiness: USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) 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) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F)
They can be grown in as north as North Carolina, etc., but it depends on the locality of plant. Calanthe discolor can be found in Hokkaido, and the climate there is about zone 5 or 6. I would say it's safe to grow in zone 7 or 8.
There is a wide range in flower color, and this is the basis of many natural (e.g., C. x bicolor) and artificial hybrids (C. Kouzu, etc.).
Terrestrial orchid from Taiwan, Korea and Japan. Has 2-5, evergreen or semi-evergreen narrow oblong mid-green leaves up to 12 inches long. Bears up to 10 purple/brown to green flowers 1½ inches across with pink or white 3 lobed lip, flower spike can reach 16 inches.
Flowers April-May
Prone to slug attacks.
Not fully hardy but can be grown outside in sheltered areas. Prefers a well drained, humus rich soil in partial shade.
Divide psuedobulbs after flowering to propagate.
Regional...
This plant has been said to grow in the following regions:
Efland, North Carolina Hillsborough, North Carolina Lexington, Virginia
2 members have or want this plant for trade.
