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Paphiopedilum sanderianum

A medium-sized, clump-forming, evergreen, tropical orchid. Bright green leaves are linear, glossy, up to 45cm long and 5cm wide. Flowering stems up to 60cm long emerge from the centre of the leaf rosette and carry 2-5 simultaneously opening flowers. The flowers are characteristic for exceptionally long, thin curled petals that measure be 60cm or more. The pouch is yellowish-green with brown or purple veins. Dorsal sepal is pale green with purple margin and 10 purple-brown stripes.

Size
Ultimate height
0.5–1 metres
Time to ultimate height
5–10 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Moisture
Well–drained
pH
Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Brown Purple Green Green
Summer Green
Autumn Green
Winter Brown Purple Green Green
Position
  • Partial shade
Aspect

East–facing or North–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H1A
Botanical details
Family
Orchidaceae
Native to the UK
No
Foliage
Evergreen
Habit
Clump forming
Genus

Paphiopedilum are mainly terrestrial, and lithophytic or epiphytic. They lack pseudobulbs and produce short stems with strap-shaped leathery leaves. Each shoot ends in a solitary flower or racemes of 2-8 flowers each with a distinctive variably-shaped lip or pouch

Name status

Unresolved

Plant range
Borneo

How to grow

Cultivation

Grow in terrestrial, bark based orchid mix, with added sphagnum moss and perlite, or crushed limestone chips. In summer, provide higher humidity and bright, filtered light. Average summer temperatures are between 20 - 25°C, with winter temperatures falling to 18 - 22°C. Apply fertiliser with every third watering. Avoid heavy misting or overhead watering. As the plant lacks pseudobulbs, it shouldn't be left dry for long time. Water plant as it approaches dryness, but avoid standing in water, or keeping wet for prolonged period. See Paphiopedilum cultivation for more detailed advice.

Propagation

Propagation by seed is only possible in a controlled laboratory environment. Mature plants may be divided when the plant overgrows its container. Each division should have at least 3 healthy, rooted plant rosettes with a suffient amount of stored energy and water, to support new growth and reduce stress after repotting.

Suggested planting locations and garden types
  • Houseplants
  • Conservatory and greenhouse
Pruning

No pruning required. Remove the flower stem after flowering.

Pests

May be susceptible to mealybugs but generally pest-free.

Diseases

May be susceptible to bacterial rots in the centre of leaf rosettes caused by overhead watering in combination with low temperatures but generally disease-free.

Get involved

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