Bulbophyllum tronguyetii

Description

Bulbophyllum tronguyetii is a miniature to small-sized epiphytic orchid in the large Bulbophyllum genus. It is valued for its unusual flowers rather than its foliage.

• Type: Epiphytic orchid

• Growth habit: Creeping rhizome with spaced pseudobulbs

• Pseudobulbs: Small, rounded to slightly oval, each carrying a single leaf

• Leaves: Narrow to elliptic, thin to moderately leathery, medium green

• Flowers: Typically small but striking, often with elongated sepals or fine hairs; coloration is usually muted (brown, yellow, cream, or reddish tones), typical of many Bulbophyllum species

• Fragrance: May be faint or unpleasant (a common trait in the genus, used to attract pollinators)

• Native range: Vietnam (humid, shaded forests)

This species is mainly grown by collectors who appreciate unusual orchid forms rather than showy blooms.

Care Guide

Light

• Low to medium indirect light

• Similar to Phalaenopsis or slightly shadier

• Avoid direct sun, which can burn leaves

Temperature

• Warm to intermediate

• Ideal range: 20–30°C (68–86°F)

• Avoid temperatures below 15°C (59°F)

Humidity

• High humidity required: 70–85%

• Constant air movement is important to prevent fungal issues

Watering

• Keep evenly moist, but never waterlogged

• Do not allow the plant to dry out completely

• Mounted plants may need daily watering in warm conditions

Growing Medium

• Best grown mounted or in shallow baskets

• If potted, use a very open, moisture-retentive mix:

  • Fine bark + sphagnum moss

  • Or pure long-fiber sphagnum (changed regularly)

• The creeping rhizome should stay on or above the surface

Fertilizer

• Feed lightly with ¼-strength orchid fertilizer

• Every 2 weeks during active growth

• Flush monthly with plain water to prevent salt buildup

Rest Period

• • No true dormancy

  • Slightly reduce watering and fertilizer in cooler or darker months, but never let it dry out