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Conservatory Greenhouse

Dendrobium chrysanthum

golden yellow-flowered dendrobium

A large-growing, epiphytic semi-evergreen orchid with pendulous, cane-like stems up to 160cm long and 0.5-1cm thick. Each noded stem is covered with alternate leaf-bearing sheaths. Each bright green, lance-shaped leaf is 10-16cm long and 3-4cm wide. Short flowering stems emerge from the axils of nodes and leaves and carry 4-5cm large, yellow flowers.

Size
Ultimate height
1–1.5 metres
Time to ultimate height
5–10 years
Ultimate spread
0.5–1 metres
Growing conditions
Moisture
Well–drained
pH
Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Yellow Green
Summer Yellow Green
Autumn Green
Winter Green
Position
  • Partial shade
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H1B
Botanical details
Family
Orchidaceae
Native to the UK
No
Foliage
Evergreen or Semi evergreen
Habit
Clump forming, Pendulous weeping
Genus

Dendrobium are epiphytic and terrestrial orchids with elongated, stem-like pseudobulbs bearing linear to ovate leaves. Racemes or panicles of showy flowers are produced from nodes along the stems mainly in spring

Name status

Correct

Plant range
Himalaya, China and SE Asia

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How to grow

Cultivation

Plants are best grown in a basket, in an epiphytic, medium grade, bark-based potting mix with added perlite, moss, or coir. As with many orchids, they grow best when the roots are slightly restricted. Therefore, avoid over-potting or frequent root disturbance. Provide bright, filtered light throughout the year. Plant requires frequent watering and relatively high humidity during summer months and a period of rest in winter - reduce watering and feeding in autumn, until warmer temperatures initiate flowering and new growth in spring. See indoor orchid cultivation

Propagation

Propagation by seed is only possible in controlled laboratory environment. Mature plants may be divided when the plant overgrows the pot. Sideshoots (keiki) may develop on older canes - remove and pot them into sphagnum moss when the new roots are at least 2cm long.

Suggested planting locations and garden types
  • Conservatory and greenhouse
Pruning

No pruning required. Remove spent flowers as necessary, but do not cut the whole cane unless completely shrivelled. Oldest canes may be removed as long as there are at least three, younger, thick, leaf-bearing canes on the plant.

Pests

May be susceptible to scale insects, aphids, mealybugs and red spider mite.

Diseases

Generally disease-free.

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