Phalaenopsis sumatrana

Also known as: The Sumatran Phalaenopsis or Phalaenopsis acutifolia Phalaenopsis sumatrana f. paucivittata Phalaenopsis sumatrana h.f. sanguinea Phalaenopsis corningiana var. flava Phalaenopsis sumatrana subvar. paucivittata Phalaenopsis paucivittata Phalaenopsis sumatrana var. paucivittata Phalaenopsis zebrina Phalaenopsis sumatrana h.v. zebrina in the subfamily: Epidendroideae

Native to: Myanmar Sabah - Malaysia Selangor - Malaysia Singapore Thailand

General Information

The Sumatran Phalaenopsis is a medium sized monopodial warm to hot growing epiphytic orchid belonging to the sub family Epidendroideae native to Myanmar, Malaysia, Singapore, and Thailand.

Plant Description

Monopodial. Each new growth has numerous elliptic leaves that grow to 11-30cm long. The plant forms pendant or arching growths

Flowers

Numerous fragrant blossoms appear

Fragrance

The orchid is fragrant.

Substrate(s)

• Bark
• Charcoal
• Spaghnum Moss
• Perlite

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. 

Fragrant:

• IsFragrant

Climate

Grows at low elevations. Rainfall ranges from 117mm to 617mm per day, heaviest in December and lightest in April. Humidity ranges from 81% to 86%, highest in December and lowest in March. Temperature ranges from 22C to 32C, highest in May (23C to 32C) and lowest in June (22C 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

These orchids do not need to be regularly fertilised and roots may be sensitive to salt build-up, dying back and therefore impairing the plants growth or even killing it.

If fertilising, use half to quarter of the recommended amount of fertiliser. If they receive fertiliser as part of a collection, be sure to flush out the pots regularly with fresh water and monitor the roots by checking how much resistance is given by the plant when nudged in its pot or mount. If the plant becomes wobbly or loose, repot in fresh mix or rinse the media/mount thoroughly and do not fertilise for at least 3 months.

Apply fertiliser regularly at half strength year round.

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,

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