Oncidium chrysomorphum

Also known as: The Golden or Oncidium leucotis Oncidium platybulbon Oncidium dasyanthum in the subfamily: Epidendroideae

Native to: Departamento del Huila - Colombia Sao Paulo - Brazil

General Information

The Golden is a small cool to warm growing epiphytic orchid belonging to the sub family Epidendroideae native to Colombia and Brazil.

Plant Description

Grows to 20-28cm. Each new growth has numerous rigid leaves that grow to 16-23cm long. Pseudobulbs grow to 4-5cm

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 high elevations. Rainfall ranges from 10mm to 109mm per day, heaviest in July and lightest in February. Humidity ranges from 73% to 83%, highest in November and lowest in March. Temperature ranges from 11C to 25C, highest in April (14C to 25C) and lowest in January (11C to 22C).

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

Apply liquid based fertiliser per recommended directions. They can benefit from a high phosphate fertiliser leading up to flowering season, followed by a high nitrogen fertiliser when new growth appears, and a balanced fertiliser in other times. These orchids can also tolerate slow release fertiliser applied 1-2 pellets per cup (250ml) of media.

Use balanced fertiliser during Spring and Summer. Apply fertiliser regularly at half strength year round. Use a high Nitrogen fertiliser during Spring and Summer. Use a high Phosphorous fertiliser during Summer.

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,

Repotting is best done annually.