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Herbaceous Perennial

Cypripedium formosanum

Formosan lady's slipper orchid

A small, hardy orchid reaching a height of around 10cm. Two apical, ovate to round plicate leaves are produced which have veins that radiate outwards likea fan. The long, slender stem produces a whitish flower with flecks of light to dark pink in the spring.

Synonyms
Cypripedium japonicum var. formosanum

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Size
Ultimate height
Up to 10cm
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring
Summer
Autumn
Winter Pink Red White Green
Position
  • Partial shade
Aspect

East–facing or North–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Orchidaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Potentially harmful
Skin allergen. Wear gloves and other protective equipment when handling
Genus

Cypripedium are terrestrial orchids with slender rhizomes and soft fan-shaped leaves, spirally arranged or in opposite pairs. Flowers are born in racemes of up to 12 flowers during summer have white, pink, red or purple tepals and a yellow, white, pink or purple pouch

Name status

Correct

Plant range
C Taiwan

How to grow

Cultivation

Grow in moist, fertile, leafy, humus-rich slightly alkaline soil in a sheltered site with dappled or partial shade - ideally with some morning sunshine. Provide an annual winter mulch of leaf mould

Propagation

Propagate by division in early or mid-spring and replant immediately. Some of the soil from the root ball, which contains beneficial fungi, should be planted with each division

Suggested planting locations and garden types
  • City and courtyard gardens
  • Underplanting of roses and shrubs
  • Flower borders and beds
Pruning

No pruning required, allow foliage to die down naturally

Pests

May be susceptible to slugs

Diseases

May be susceptible to grey moulds

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