About
Dendrobium spectabile is a large, impressive epiphytic orchid with swollen, cane-like pseudobulbs. Short racemes carry a few waxy, ornately shaped flowers with contorted, striped petals and sepals � among the most architecturally distinctive of any orchid. A remarkable and unusual orchid for a warm to hot greenhouse.
About the genus
Dendrobium are one of the largest genera of orchids, comprising epiphytic and terrestrial species from tropical and subtropical Asia, Australia and the Pacific. They produce elongated, cane-like or club-shaped pseudobulbs bearing linear to ovate leaves, and racemes of showy flowers from nodes along the stems, mainly in spring and summer. Dendrobium span a huge range of sizes, habits and cultural requirements.
Growing conditions
SunlightFull sun, Partial shade
Soil pHNeutral
Soil moistureWell-drained
AspectEast-facing, South-facing, West-facing
ExposureSheltered
UK hardinessH1C
Plant details
Plant typeConservatory Greenhouse
HabitClump forming, Columnar upright
FoliageEvergreen
Height0.5-1 metres
Spread1-1.5 metres
Time to full height5-10 years
Suggested usesHouseplants
FragranceFlower
Care notes
CultivationPlants are best grown in a pot in an epiphytic, medium grade, bark-based potting mix with addition of sustainably sourced 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 dappled shade and higher humidity in spring and summer, then move the plant to a bright, but cool room in autumn and winter. Reduce watering and feeding until warmer temperatures initiate flowering and new growth in spring. See indoor orchid cultivation
PruningNo 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
PropagationPropagation 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
Pest resistanceMay be susceptible to scale insects, aphids, mealybugs and red spider mite
Disease resistanceGenerally disease-free