Bulbophyllum cortortisepalum "red"

Description

• Type: Epiphytic orchid

• Growth habit: Creeping rhizome with closely spaced pseudobulbs

• Pseudobulbs: Small, rounded to slightly flattened, each bearing a single leaf

• Leaves: Elliptic to oblong, medium green, slightly leathery

• Flowers: Solitary to few per inflorescence; narrow, strongly twisted sepals (the species name cortortisepalum refers to this twisting). The “Red” form shows deeper reddish to maroon tones, sometimes with darker striping or shading

• Blooming habit: Often blooms sequentially from mature growths

• Fragrance: Usually mild to none, sometimes faintly musky

• Native range: Southeast Asia (humid, shaded forests)

This plant is grown primarily for its unusual, sculptural flowers rather than for showy size or fragrance.

Care Guide

Light

• Low to medium indirect light

• Similar to Phalaenopsis or slightly shadier

• Avoid direct sun, which can scorch leaves

Temperature

• Warm-growing

• Ideal range: 20–30°C (68–86°F)

• Minimum: 15°C (59°F)

Humidity

• High humidity: 70–85%

• Provide constant, gentle air movement to prevent rot and fungal issues

Watering

• Keep consistently moist, but never waterlogged

• Do not allow the medium to dry completely

• Mounted plants may need daily watering in warm conditions

Growing Medium

• Best grown mounted, in net pots, or shallow baskets

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

  • Fine bark with sphagnum

  • Or pure long-fiber sphagnum (replace regularly)

• Keep the creeping rhizome on the surface, not buried

Fertilizer

• Feed lightly with ¼-strength balanced orchid fertilizer

• Every 1–2 weeks during active growth

• Flush with plain water monthly to avoid salt buildup

Rest Period

• No true dormancy

• Growth may slow in cooler or darker months—reduce fertilizer slightly but maintain moisture