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Conservatory Greenhouse

Dendrobium lasianthera

A large-sized, tropical, epiphytic orchid with long, upright, cane-like stems. The stems (pseudobulbs) carry alternate, oval leaves, arranged along the nodes of the whole length of the stem. Upright or arching flowering stems up to 60cm long emerge from the nodes of mature leafed, or leaf-less stems and bear 10 to 30 flowers. The flowers are approximately 6cm large, waxy and long lasting. Petals and sepals are spirally twisted along the whole lenght. Petals are usually narrower and darker in colour. Centre of the flower is usually white or yellow, with purple lip.

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 Green Yellow Cream White Yellow Pink Purple Green
Summer Green Yellow Cream White Yellow Pink Purple Green
Autumn Green Yellow Cream White Yellow Pink Purple Green
Winter Green Yellow Cream Green
Position
  • Partial shade
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H1A
Botanical details
Family
Orchidaceae
Native to the UK
No
Foliage
Evergreen
Habit
Columnar upright, Clump forming
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
New Guinea

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How to grow

Cultivation

Grow 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 light conditions throughout the year. The average temperatures are 25-30°C during day and 16-20°C at night time, with an amplitude of 8-10°C between day and night. Plant requires frequent watering and relatively high humidity during spring and summer months and a slightly drier conditions in winter - reduce watering and feeding in October, but do not leave plant dry for long period of time.

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 enough, 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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