trefle.io · Taken Jan 1, 1900 by EOL − Dcrjsr (cc-by)
Orchidaceae
Irish lady's-tresses
Spiranthes romanzoffiana
Also known as Spiranthes romanzoffiana, Irish ladies' tresses orchid, Hooded lady's tresses, Neottia gemmipara
Flowering Plants · Native Plants · Native Orchid · Bog Plant · Wetland · Rare · Wildflower · Cool Climate · Terrestrial Orchid · White Flowers · Endangered
Irish lady's-tresses is a rare native terrestrial orchid that requires moist, nutrient-poor soil and cool temperatures to thrive. It is best grown in bog gardens or along stream margins where conditions mimic its natural wet meadow habitat. This species is highly sensitive to soil disturbance and chemical fertilizers, so minimal intervention is key.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Keep soil consistently moist but never waterlogged · Every 5-7 days
- Maintenance
- High
- Soil
- loam
- Soil pH
- 4.5–8.5
- Temperature
- -25°F to 95°F
- Cycle
- Perennial
Hardiness
USDA 4b-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 4 ft
- Spread
- 3 ft
- Spacing
- 6 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- White
- Foliage
- Green · Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Alaska, Alberta, Aleutian Is., Arizona, British Columbia, California, Colorado, Connecticut, Great Britain, Idaho, Illinois, Indiana, Iowa, Ireland, Labrador, Maine, Manitoba, Maryland, Masachusettes, Michigan
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
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No nursery lists Irish lady's-tresses right now.