Photo by Melody

PlantFiles: Species Orchid, Small White Lady's Slipper
Cypripedium candidum

Family: Orchidaceae (or-kid-AY-see-ee) (Info)
Genus: Cypripedium (sip-rih-PEE-dee-um) (Info)
Species: candidum (KAN-did-um) (Info)

Synonym:Calceolus candidus

5 members have or want this plant for trade.

View this plant in a garden


6-12 in. (15-30 cm)

9-12 in. (22-30 cm)

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)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)

Sun Exposure:
Sun to Partial Shade

Handling plant may cause skin irritation or allergic reaction

Bloom Color:
White/Near White

Bloom Time:
Mid Spring


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

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

Click thumbnail
to view:

By KWoods
Thumbnail #1 of Cypripedium candidum by KWoods

By bogman
Thumbnail #2 of Cypripedium candidum by bogman


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral genshiro On Jun 17, 2010, genshiro from Whitby
Canada wrote:

This plant ( Orchidaceae cypripedium candidum) is on the endangered species list for Ontario, Canada. It is reported as being endangered nationally (Canada) as well as provincially (Ontario). In Ontario, it is protected under the Ontario Endangered Species Act, 2007. It would be prudent to check it's status and any legislation regarding it for your area, before buying, selling, owning or collecting it.

On doing further research, I have found out that this plant is also threatened in the USA, extirpated from Pennsylvania, endangered in South Dakota and Wisconsin, threatened in Illinois, Kentucky and Michigan and rare in Missouri and North Dakota.

Neutral smiln32 On Aug 19, 2002, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

The flowers are very fragrant. It seems to have a preference for alkaline soils.


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

Glen Cove, New York
Cleveland, Ohio

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