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Conservatory GreenhouseHouseplants

Cattleya Portia gx

A medium to large-sized, evergreen, epiphytic orchid with long, upright, club-shaped stems growing from a short creeping rhizome. Each mature stem can reach up to 90cm, carrying one or two (rarely three), firm, dark green, mid-glossy leaves. The leaves are thick and leathery, broadly-oval, up to 20cm long and 6cm wide. Up to 15 flowers are carried on 25cm long, terminal stems arising from the tips of new mature growth from autumn to early spring. Flowers are approximately 8-10cm across, pale or bright pink, sometimes pale lilac - depending on cultivar. The lip is ofter darker in the lower half and pale yellow or white inside.

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 Pink Purple White Yellow Green
Summer Green
Autumn Pink Purple White Yellow Green
Winter Pink Purple White Yellow 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

Accepted

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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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