Oncidium spilopterum

Also known as: The Spotted Wing Oncidium in the subfamily: Epidendroideae

Native to: Bahia - Brazil Minas Gerais - Brazil

General Information

The Spotted Wing Oncidium is a warm to hot growing epiphytic or terrestrial orchid belonging to the sub family Epidendroideae native to Brazil.

Plant Description

Grows to 18-27cm. Each new growth has numerous lance shaped leaves that grow to 1.5-20cm long. Pseudobulbs grow to 2.5-7cm

Flowers

Numerous blossoms appear during Autumn

Blooming Season

• Autumn

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 18mm to 348mm per day, heaviest in June and lightest in January. Humidity ranges from 71% to 83%, highest in June and lowest in February. Temperature ranges from 9C to 24C, highest in July (16C to 24C) and lowest in January (9C to 19C).

Watering

These orchids are sensitive to excessive watering and should only be watered when they look thirsty. Water infrequently and ensure that the roots are dry before watering. Keep an eye on them especially during hot weather as overwatering can lead to rot, whereas underwatering may result in wilting or shriveling, which while unattractive, will not kill the plant.

Fertiliser

These plants do well with slow release fertiliser at the rate of 2-3 pellets per cup (250ml) of media. Additional fertiliser during the growth period may be beneficial, but not necessary.

Potting

These plants can be sensitive to repotting though should not require repotting regularly. Repotting should be done when the mix has broken down to the point that it doesn't absorb water or holds onto water for far too long, usually the plant shows a decline in growth as well.

The mix should be free draining, with a blend of 30% inorganic ingredients such as coarse sand, gravel or perlite, mixed in with about 70% organic ingredients such as peat, leaf litter or decomposed bark. Avoid commercial potting mixes as they can vary wildly and may contain "wetting agents" that can hold onto water for loo long, causing rotting and stunted growth.