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Conservatory Greenhouse

Cattleya intermedia

A medium-sized, evergreen, epiphytic orchid with upright, cane-like stems growing from a short, creeping rhizome. Each stem (pseudobulb) is cylindrical or spindle-shaped, broader in the upper half, carrying two to four, broadly-oval, dark green leaves. Three or more flowers are held on short, terminal stems, arising from the tips of new mature stems in spring or summer. Each long-lasting, scented flower measures up to 10cm across and may vary in shape and colour. Some forms have narrower petals and sepals, and a more tubular lip, others are more flat, with wider petals and an open, rounded lip. Flowers are usually white with a pale or dark pink pattern, occasionally pale purple or pure white.

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, Moist but well–drained
pH
Neutral
Colour & scent
StemFlowerFoliageFruit
Spring White Pink Green
Summer White Pink Green
Autumn Green
Winter Green
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H1A
Botanical details
Family
Orchidaceae
Native to the UK
No
Foliage
Evergreen
Habit
Clump forming
Name status

Correct

Plant range
S. America

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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 of 28°C during summer. Water and feed plants regularly during the growing season. Ensure that all water drains away, preventing the plant sitting in water. 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 growths 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 glasshouse red spider mite, scale insects and mealybugs. Thrips may cause damage on flowers.

Diseases

Generally disease-free. Poor air movement may cause bacterial or fungal rots. Good hygiene practice and sterilising cutting tools prevent the spread of virus diseases.

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