Bulbophyllum orchids are one of the most diverse orchid groups in the world, with over 2,000 species ranging from tiny miniatures to large, dramatic specimens. Their unusual growth style, creeping rhizomes, and distinctive flowers make them favourites among collectors — but they do grow differently from most orchids. This guide explains how to grow Bulbophyllum orchids successfully in Australian conditions.
What Makes Bulbophyllum Unique?
Bulbophyllum orchids grow across a creeping rhizome rather than upright. They often spread sideways, climb over pots, or attach beautifully to mounts.
- Creeping rhizomes that must stay exposed
- Preference for airy, fast-draining setups
- Love humidity and gentle airflow
- Produce new growths quickly in good conditions
Light Requirements
Bulbophyllum orchids prefer bright, filtered light similar to a shaded greenhouse or a position with 50–70% shadecloth. Indoors, place them near a bright window without direct sun.
Too much sun causes leaf scorch; too little light slows growth and reduces flowering.
Temperature
Most species grow well in daytime temperatures of 18–28°C and nighttime temperatures of 15–18°C. They enjoy warm, humid conditions and can tolerate short warm spells if kept shaded and moist.
Humidity & Airflow
Humidity is important for Bulbophyllum orchids. Aim for 60–80% humidity with gentle airflow around the plant. Mounted plants need higher humidity and more frequent watering.
Watering
Keep Bulbophyllum orchids evenly moist but never waterlogged.
- Water more frequently in warm weather
- Water less in winter but avoid long dry periods
- Mounted plants may need daily watering in summer
- Potted plants generally need watering 2–3 times a week
Potting & Mounting
Choose shallow orchid pots, squat pots, slotted baskets, cork mounts, or tree-fern plaques. The right choice depends on the species and your growing conditions.
For a detailed guide on potting, mounting, and selecting the right media, please see our Help Centre article:
“Potting Bulbophyllum Orchids (Mounted & Potted)”
General Potting Rules
- Keep the rhizome exposed on top of the mix
- Use airy, fast-draining mixes (bark, bark + sphagnum, bark + perlite)
- Avoid deep pots
- Repot during active growth, when new roots appear
Fertilising
Use a balanced orchid fertiliser at ¼–½ strength:
- Weekly during warm, active growth
- Every 2–3 weeks in cooler months
Flush occasionally with plain water to remove salt build-up.
Mounted vs Potted
Mounted
Best for miniature and creeping species, or growers with high humidity. Mounted plants benefit from excellent airflow but require frequent watering.
Potted
Best for moisture-loving species or growers who cannot water daily. Easier to maintain but care must be taken to avoid soggy media.
Common Problems
Rot
Usually caused by overwatering, stale mix, or burying the rhizome.
Lack of Growth
Often due to low light, old media, or dryness.
Pests
Watch for scale, mites, and fungus gnats. Treat early with orchid-safe products.
Quick Summary
- Bright, filtered light
- High humidity with gentle airflow
- Keep the plant evenly moist
- Use shallow pots or mounts with airy media
- Keep the rhizome exposed
- Fertilise lightly during active growth
