Oncidium Culture

This large group of evergreen orchids come from Central and South America. They are epiphytes or lithophytes and most occur at high altitudes. They grow from pseudobulbs from which one to four leaves emerge. Flower spikes are very variable and may be tall or short, upright or arching in habit but all originate from the base of the pseudobulb. Many species are grown but it is the hybrids that are widely cultivated. The hybrids occur in almost every colour of the rainbow and are marked in an extraordinary range of patterns.

Onc. Speciality's Cameo

Requires a frost-free, but generally not a hot tropical climate. Temperature range from 10C to 25C is ideal but with care they can cope with a higher and lower range .  High humidity is essential for these orchids.

Shade, especially in summer when 70% shade cloth should be used. This can be reduced to about 50% shading in winter

Potting Mix

A very open and free draining pine bark based mix. Pebbles, charcoal etc can be added, they can also be grown in sphagnum moss. Don’t over-pot. Use pots just large enough to confine the roots.


Divide plants after flowering when the new growth is showing sign of active root movement. Don’t over pot your divisions.


Don’t allow plants to become bone dry, but the roots should never be sodden for a long period of time. . Frequency of watering depends on the mix used and the weather. Early morning in the winter or in the evening in summer is best. If watering in the winter be sure that foliage will be able to dry out before the cold of the night. If grown in a confine space eg. a shade house create humidity by hosing down the floor.


Use a product design for orchids, follow the instructions. If in sphagnum moss use half strength as this will sour the moss


The flowering season is very variable, depending on the species or hybrid.


Aphid, scale and mealy bug are common. Use a commercial product such as Eco Oil. Check your plants often especially when in bud.