Soil & potting mix
Best soil for Strongly-Scented Bulbophyllum (Bulbophyllum graveolens)
Also called Strongly-Scented Bulbophyllum, Strong-Smelling Bulbophyllum.
More about strongly-scented bulbophyllum
About Strongly-Scented Bulbophyllum
Bulbophyllum graveolens · also called Strongly-Scented Bulbophyllum, Strong-Smelling Bulbophyllum · tropical
Bulbophyllum graveolens is a large, dramatic epiphytic orchid from Papua New Guinea, producing enormous inflorescences of bold yellow flowers with red-purple spotted sepals. True to its name, the flowers emit a pungent carrion-like scent to attract fly pollinators. Despite the odour, it is a spectacular collector's orchid requiring warm, humid conditions and a well-draining epiphytic substrate.
Preferred mix: Fine to medium bark mix, or mounted on cork slab
Watch for — Rhizome rot at pseudobulb base: The creeping rhizome can rot at points where it contacts constantly wet medium or standing water. Elevate the rhizome slightly above the medium surface and ensure rapid drainage. Trim rotted sections back to clean tissue and dust with sulphur or cinnamon powder.
Why strongly-scented bulbophyllum needs this mix
Strongly-Scented Bulbophyllum is an easy-going houseplant — it just wants a free-draining general mix that holds some moisture but never stays soggy.
- Strongly-Scented Bulbophyllum is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
- A little perlite or bark stops ordinary compost compacting into an airless block over time, which is the slow, common cause of decline.
- It is not fussy about pH or special ingredients; getting the air-to-moisture balance right is what matters.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons strongly-scented bulbophyllum struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates strongly-scented bulbophyllum's roots.
- A pure peat mix that dries to a hard, water-repelling block is hard to re-wet and stresses the plant.
- No drainage hole turns even a good mix into a stagnant, root-rotting sump.
Reusing tired, compacted old compost or skipping the perlite. A free-draining mix in a pot with a hole solves most "why is it struggling" cases for strongly-scented bulbophyllum.
pH — does it matter for strongly-scented bulbophyllum?
Strongly-Scented Bulbophyllum is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
A decent bagged houseplant compost works for strongly-scented bulbophyllum as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Drainage and the pot
A pot with a drainage hole and a saucer you empty after watering is all strongly-scented bulbophyllum needs — the free-draining mix does the rest.
Refresh strongly-scented bulbophyllum's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. When the time comes, our repotting guide for strongly-scented bulbophyllum covers the timing and technique step by step.
Strongly-Scented Bulbophyllum soil — frequently asked questions
What is the best soil mix for strongly-scented bulbophyllum?
3 parts peat-free houseplant compost : 1 part perlite : 1 part orchid bark or coco chips (optional). Strongly-Scented Bulbophyllum is adaptable, but like most houseplants it still needs air at the roots — a mix that drains freely while holding a working moisture reserve.
Can I use normal potting soil for strongly-scented bulbophyllum?
Plain garden soil or a cheap, claggy compost compacts in the pot and slowly suffocates strongly-scented bulbophyllum's roots. A decent bagged houseplant compost works for strongly-scented bulbophyllum as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
Does strongly-scented bulbophyllum need a special pH?
Strongly-Scented Bulbophyllum is not fussy about pH — a slightly acidic to neutral mix (around pH 6.0-7.0), which a standard peat-free compost provides, is perfectly fine. No testing needed.
Should I buy a bagged mix or make my own for strongly-scented bulbophyllum?
A decent bagged houseplant compost works for strongly-scented bulbophyllum as long as you mix in perlite for air. The simple DIY ratio above is cheap and more reliable than a budget bag alone.
How often should I refresh the soil for strongly-scented bulbophyllum?
Refresh strongly-scented bulbophyllum's mix every 18-24 months; even good compost slumps and compacts, and fresh, airy mix is often the simplest fix for a tired plant. A pot with a drainage hole and a saucer you empty after watering is all strongly-scented bulbophyllum needs — the free-draining mix does the rest.
Keep reading
- Strongly-Scented Bulbophyllum care — the full brief (light, water, humidity, problems, pet safety)
- How often to water strongly-scented bulbophyllum — the schedule the mix feeds into
- Repotting strongly-scented bulbophyllum — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Should I water my plant? The simple check first
- Overwatered plant — signs and recovery
- Root rot — how the wrong soil starts it, and how to save the plant
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- All 8452 soil and potting-mix guides in the Growli library