About
A medium-sized, warm-growing epiphytic orchid. New growth emerges from the base of swollen stems (pseudobulbs). Each pseudobulb is round, approximately 3-5cm large, carrying single, 15 - 20cm long leaf. Each rigid leaf is dark green mottled with purple or brown-red. New flowering stems emerge from the base of young, mature pseudobulb and carry numerous, flowers developing in succession. Each upright stem can measure up to 120cm. Flowers are unusually shaped, 13-15cm large and yellow with a reddish-brown pattern.
About the genus
Oncidium are a large genus of epiphytic orchids; mature plants form clumps of ovoid to conical pseudobulbs, each with 1-3 mid-green, variably-shaped, leathery leaves arising from the tips. Flower panicles from the bases of the pseudobulbs widely differ in colour and shape
Growing conditions
SunlightPartial shade
Soil pHNeutral
Soil moistureMoist but well-drained, Well-drained
AspectEast-facing, North-facing, West-facing
ExposureSheltered
UK hardinessH1A
Plant details
Plant typeConservatory Greenhouse, Houseplants
HabitColumnar upright, Clump forming
FoliageEvergreen
Height0.5-1 metres
Spread0.1-0.5 metres
Time to full height5-10 years
Suggested usesHouseplants
Native toTrinidad, Venezuela, Colombia, Peru
ToxicitySkin allergen. Wear gloves and other protective equipment when handling
Care notes
CultivationGrow in an open bark-based orchid compost with addition of perlite, sphagnum moss or coir. Provide enough bright filtered light, but keep away from direct sunlight or a heating source. Ideal temperatures are around minimum 14°C at night and up to maximum 30 °C during day. Water regularly, when the pot feels light when lifted. Ensure that all water drains away, preventing the plant sitting wet. Orchid fertiliser can be applied regularly throughout the growing season. Reduce watering and feeding in winter months. For more notes on cultivation, see oncidium orchid (warm) cultivation
PruningNo pruning required. Do not remove flowering stems, as they will re-flower if left undisturbed.
PropagationPropagation by seed is only possible in a controlled laboratory environment. Mature plants may be divided when the plant overgrows its container. Each division should have at least 3 older pseudobulbs with a sufficient amount of stored energy and water, to support new growth and reduce stress after repotting.
Pest resistanceMay be susceptible to mealybugs, aphids and scale insects.
Disease resistanceGenerally disease-free. Poor air movement may cause bacterial or fungal rots. Good hygiene practice and sterilising cutting tools prevent the spread of virus diseases.