Oncidium oblongatum

Also known as: The Slanting Oncidium or Oncidium brevifolium in the subfamily: Epidendroideae

Native to: Guatemala Guerrero - Mexico

General Information

The Slanting Oncidium is a medium sized sympodial cool to warm growing epiphytic orchid belonging to the sub family Epidendroideae native to Guatemala and Mexico.

Plant Description

Sympodial. Grows to 16-47cm. Each new growth has numerous leathery arching, lance shaped leaves that grow to 1.7-37cm long. Pseudobulbs grow to 1.7-10cm. The plant forms clusters over time

Flowers

Numerous fragrant blossoms appear during Autumn

Fragrance

The orchid is fragrant.

Blooming Season

• Autumn

Substrate(s)

• Coarse
• Medium
• Bark
• Charcoal
• Perlite

Care Notes

These orchids like to be kept on the dry side, but may need to be watered daily during warm weather, and prefer a well draining mix or also do well mounted, provided they can be watered regularly.

These are quite a forgiving orchid, there are no special requirements to get this orchid to flower, just good care and consistent conditions. Larger plants may be more fussy and can react poorly to change; a poorly timed repotting, a pest infection or an unusually hot day can set them back for a couple of years. However, even plants that have been treated poorly can thrive, and if they are set back they often recover much stronger then they would otherwise be.

Fragrant:

• IsFragrant

Climate

hot-forest-orchids Grows at high elevations. Rainfall ranges from 3mm to 170mm per day, heaviest in June and lightest in January. Humidity ranges from 55% to 75%, highest in September and lowest in March. Temperature ranges from 5C to 28C, highest in April (12C to 28C) and lowest in January (5C to 22C).

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.

Keep moisture levels up during hot weather as the plant is prone to dehydration

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,

Use water retentive media such as moss to prevent roots from drying out quickly This plant does very well in baskets or suspended pots This plant does well mounted to Tree trunks, Fern slabs or Cork slabs. Repotting is best done annually.