trefle.io · Taken Jul 15, 2021 by Emanuele Santarelli (cc-by-sa)
Orchidaceae
Royal helleborine
Epipactis atrorubens
Also known as Sword-leaved helleborine, Epipactis helleborine, Narrow-leaved helleborine, Helleborine atropurpurea var. dilatata
Native Plants · Orchid · Woodland · Shade · European Orchid · Calcareous · Wildflower · Perennial · Specialist · Mycorrhizal · Rock Garden
Royal helleborine is a specialist woodland orchid that requires a carefully prepared, well-drained calcareous soil with dappled shade to thrive. It depends on specific mycorrhizal fungi in the soil and does not transplant easily, making it best suited for established woodland or rock garden settings. Avoid overwatering and do not disturb the root zone once planted.
Growing conditions
The details behind the basics
- Daily light
- 3 hours
- Watering
- Water moderately, keeping soil consistently moist but never waterlogged · Every 7-10 days during active growth
- Maintenance
- High
- Soil
- loam
- Soil pH
- 6.5–8
- Temperature
- -20°F to 80°F
- Cycle
- Perennial
Hardiness
USDA 4a-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 3 ft
- Spread
- 12 in
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Shallow
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Albania, Austria, Baltic States, Belarus, Belgium, Bulgaria, Central European Rus, Czechoslovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Netherlands, North Caucasus
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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