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Conservatory Greenhouse

Ansellia africana 'Chlorantha' × africana 'Stonehurst Yellow'

A warmth-loving, large-sized, tropical epiphytic orchid, producing a large clump of cane-like, cylindrical stems called pseudobulbs, which serve as the plants storage of water and nutrients. The pseudobulbs (30-150cm tall) are noded and yellow when mature, each carrying up to seven green, firm leaves. The narrow, lance-shaped leaves are variable in size, 15-50cm long and 1-5cm wide. Flowering stems emerge from the upper nodes around tips of mature pseudobulbs. Each flowering stem is up to 80cm long, carrying approximately 30 small, pale-yellow flowers

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1–1.5 metres

Moisture

Well–drained

pH

Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or South–facing or West–facing

Exposure

Exposed or Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

H1A

Botanical details

Native to GB / Ireland: No
Foliage: Evergreen
Habit: Clump forming, Tufted

How to grow

Cultivation

Grow in an open, coarse bark-based orchid mix with addition of perlite and coconut chips. Provide bright light conditions, but shade from hot, direct mid-day sun. Ideal temperatures are 15°C minimum in winter and up to maximum 28 °C during summer daytimes. Water and feed plants regularly during the growing season. Ensure that all water drains away, preventing the plant sitting in wet. Provide enough humidity by regular misting. Reduce watering and feeding in winter months and keep in a bright, sunny position. As with many orchids, they grow best when well-established and slightly pot-bound. Re-potting should be only done if the plant overgrows its container or before the potting mix starts to deteriorate - approximately once in 2-3 years. The plant should only be re-potted when the new growth appears in spring. See also indoor orchid cultivation

Propagation

Mature plants may be divided when the plant overgrows its container. Each division should have at least 3 older pseudobulbs with a sufficient amount of stored energy and water, to support new growth and reduce stress after repotting

Suggested planting locations and garden types

Conservatory and greenhouse

Pruning

No pruning required

Pests

May be susceptible to mealybugs, aphids and scale insects

Diseases

Generally disease-free

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