Coelogyne Brymeriana gx

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<em>Coelogyne</em> Brymeriana gx RHS
Conservatory Greenhouse

A large-sized, epiphytic orchid up to 1m tall and wide, producing a clump pseudobulbs, which serve as storage organs for water and nutrients. Each cylindrical pseudobulb is 25-30cm tall and carries a pair of stiff, dark-green, lange-shaped leaves. Each leaf measures 5-10cm wide and up to 70cm long. The orchid usually flowers in spring on 45-70cm long, pendulous stems. Each stem carries 15 to 60 pale-cream, sometime yellow-green flowers. Star-shaped, 4cm large flowers have pale petals and sepals with medium to dark-brown markings on a lip. This orchid is considered a "primary hybrid" because it is a cross of two species

Position

Partial shade

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
5–10 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

Moisture
Moist but well–drained or Well–drained
pH
Neutral

Position

Partial shade
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
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

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Orchidaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Clump forming, Pendulous weeping
Genus
Coelogyne are epiphytic orchids producing pseudobulbs, each bearing 2 leathery pleated leaves and flowers in racemes, mainly from the centre of the new growth in spring and summer
Name Status
Accepted

How to Grow

Cultivation

Grow in an open, free-draining, bark-based orchid mix. Provide enough bright filtered light, but keep away from direct sunlight or a heating source. Ideal temperatures are around 16 °C minimum at night and up to 28 °C during the day. Water regularly, when the pot feels light when lifted. Ensure that all water drains away, preventing the plant from sitting wet. Orchid fertiliser can be applied regularly throughout the growing season. Reduce watering and feeding in winter months. The orchid will naturally produce rhizomes with aerial roots growing outside the pot. 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. See indoor orchid cultivation for more tips

Propagation

Propagation by seed is only possible in a controlled laboratory environment. Well-established plants can be propagated by division. Ensure each division has young enough, mature pseudobulbs to support new growth

Suggested planting locations and garden types

  • Houseplants
  • Conservatory and greenhouse

Pruning

No pruning required other than removing spent flower stems

Pests

May be susceptible to scale insect and mealybugs. Thrips can cause damage on flowers and developing flower buds

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