Acianthera aphthosa

Also known as: Pleurothallis ciliata var. abbreviata Pleurothallis pelioxantha Pleurothallis macrophyta in the subfamily: Epidendroideae

Native to: Departamento del Huila - Colombia Ecuador Paraguay Peru Sao Paulo - Brazil

General Information

Acianthera aphthosa is a cool to hot growing epiphytic orchid belonging to the sub family Epidendroideae native to Colombia, Ecuador, Paraguay, Peru, and Brazil.

Plant Description

Grows to 26cm. Each new growth has a single leathery thick, erect, lance shaped leaf that grows to 4.5-15cm long. Pseudobulbs grow to 1-1.5cm. The plant tends to climb or sprawl with each new growth

Flowers

Numerous short lasting blossoms appear

Fragrance

The fragrance can be described as putrid and similar

Substrate(s)

• Coarse
• Medium
• Bark
• Charcoal
• Spaghnum Moss
• Perlite

Care Notes

These orchids like to be watered regulary, especially during warm weather, and prefer a well draining mix or also do well mounted, provided they can be watered daily or even many times a day.

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.

Climate

Grows at low to high elevations. Rainfall ranges from 114mm to 632mm per day, heaviest in May and lightest in December. Humidity ranges from 76% to 81%, highest in July and lowest in February. Temperature ranges from 13C to 27C, highest in February (14C to 27C) and lowest in January (13C to 25C).

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.

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 or Fern slabs. Repotting is best done annually and in a pot the same size or only slightly larger than the previous one.