Oncidium speciosum

Native to: Brazil

General Information

Oncidium speciosum is a sympodial cool to warm growing epiphytic orchid belonging to the sub family Epidendroideae native to Brazil.

Plant Description

Sympodial. Grows to 30-48cm. Each new growth has numerous leaves that grow to 23-38cm long. Pseudobulbs grow to 3-10cm. The plant tends to climb or sprawl with each new growth

Care Notes

These orchids have a fine root system that can quickly die back if left dry for too long, but also does not like to be kept wet, so water regularly but ensure that the mix is dry before watering. 

Climate

Grows at low to high elevations. Rainfall ranges from 53mm to 160mm per day, heaviest in June and lightest in February. Humidity ranges from 82% to 86%, highest in March and lowest in July. Temperature ranges from 13C to 26C, highest in August (18C to 26C) and lowest in January (13C to 20C).

Watering

These orchids prefer a wet-dry cycle between waterings, they should be watered frequently but only when the moisture is approaching dryness, where the pot feels light and/or the media looks dry. Keep an eye on mounted orchids in warm weather as they may dehydrate quickly.

Fertiliser

These orchids do not need to be regularly fertilised and roots may be sensitive to salt build-up, dying back and therefore impairing the plants growth or even killing it.

If fertilising, use half to quarter of the recommended amount of fertiliser. If they receive fertiliser as part of a collection, be sure to flush out the pots regularly with fresh water and monitor the roots by checking how much resistance is given by the plant when nudged in its pot or mount. If the plant becomes wobbly or loose, repot in fresh mix or rinse the media/mount thoroughly and do not fertilise for at least 3 months.

This plant is sensitive so apply fertiliser sparingly at one quarter recommended strength or less. Reduce fertiliser when plant is dormant during Spring.

Potting

These plants are quite forgiving and will do well repotted ever 2-3 years. The mix should be coarse, well draining, and allow space for air to move and for roots to grow. 

Alternatively, these plants will also do well mounted to tree fern or cork slabs, or mounted to trees.

Best time for repotting or mounting the orchids is the end of winter when new growths start to appear. Avoid repotting during hot weather,