Oncidium isthmi

Also known as: The Narrow Oncidium or Oncidium isthmii in the subfamily: Epidendroideae

Native to: Panama

General Information

The Narrow Oncidium is a cool to hot growing epiphytic orchid belonging to the sub family Epidendroideae native to Panama. The name refers to the narrow mid lip.

Plant Description

Each new growth has numerous leathery lance shaped leaves that grow to 1.5-45cm long. Pseudobulbs grow to 12cm

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 low to high elevations. Rainfall ranges from 23mm to 249mm per day, heaviest in November and lightest in January. Humidity ranges from 71% to 86%, highest in September and lowest in March. Temperature ranges from 23C to 32C, highest in March (24C to 32C) and lowest in January (23C to 29C).

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.

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,