Coelogyne cumingii

Also known as: Cuming's Coelogyne or Pleione longibracteata Coelogyne longibracteata Coelogyne casta in the subfamily: Epidendroideae

Native to: Singapore Thailand

General Information

Cuming's Coelogyne is a sympodial warm growing epiphytic orchid belonging to the sub family Epidendroideae native to Singapore and Thailand. It is named after the English Orchid Collector, the Philippines in the 19th century.

Plant Description

Sympodial. Grows to 2.5-25cm. Each new growth has numerous erect arching, rigid, elliptic leaves that grow to 3-16cm long. Pseudobulbs grow to 4cm. The plant tends to climb or sprawl with each new growth

Substrate(s)

• Coarse
• Medium
• Fine
• Bark
• Charcoal
• Treefern
• 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 56mm to 325mm per day, heaviest in September and lightest in February. Humidity ranges from 66% to 84%, highest in October and lowest in February. Temperature ranges from 19C to 31C, highest in March (21C to 31C) and lowest in January (19C to 28C).

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. Be sure to flush out excess fertiliser by running water through the media regularly year round. 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

It's best to observe the root system when repotting and use that as a guide:

A plant with a short root system will do better in a shallower pot with a fine mix, or mounted on fern or cork supplanted with a good amount of moss or similar material.

A plant with a long root system often does well in a pot filled with moss or fine media, mixing in perlite and charcoal is always beneficial to reduce the likelihood of the mix becoming soggy and keeps it fresh.

A plant with a coarser long root system can be potted in a deeper pot, but with 2/3 coarse material such as bark, expanded clay, or coco chips and topped with moss or similar material. This will allow the moisture to remain inside the pot but give the roots air as well.

This plant does very well in baskets or suspended pots Repotting is best done annually.