Species Orchid, Cypripedium, Lady Slipper Orchid, Large Flowered Cypripedium

Cypripediummacranthos

Family
Orchidaceae (or-kid-AY-see-ee)
Genus
Cypripedium (sip-rih-PEE-dee-um)
Species
macranthos (mak-RANTH-os)
Synonym
Sun Exposure
Light Shade
Foliage
Herbaceous
Height
6-12 in. (15-30 cm)
Spacing
9-12 in. (22-30 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)
Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Magenta (pink-purple)
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Patent Information
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; germinate in vitro in gelatin, agar or other medium
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

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

Dayville, Connecticut

East Haddam, Connecticut

Prospect, Kentucky

Greenville, New Hampshire

Charlestown, Rhode Island

Foster, Rhode Island

Blacksburg, Virginia

Rhoadesville, Virginia

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Gardener's Notes:

2
positives
0
neutral
0
negative
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D
East Haddam, CT | August 2011 | positive

I have found this species one of the easiest ladyslippers to cultivate. It is more forgiving of less than perfect conditions, and grows ...Read More

T
Rhoadesville, VA | April 2010 | positive

I have these all along my driveway, in various colors of pink as well as a very few whites...as I understand it they are all protected an...Read More

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