Bulbophyllum lobbii is one of the most fascinating orchids you can grow, and it is a species that often shocks first-time growers. This orchid produces unusually large flowers with a fragrance that reminds some of rotting fruit, while others swear it smells like a barnyard on a hot day. If you are looking for a conversation piece that challenges the typical “delicate orchid” stereotype, this is the plant for you.
Native to the warm, humid forests of Southeast Asia, this species is not a beginner’s plant, but it is not impossible either. You just need to understand its specific quirks, from its creeping growth habit to its dramatic, hairy blooms. In this guide, you will learn everything about potting, watering, lighting, and getting this beast to flower indoors.
Understanding The Bulbophyllum Lobbii
Before you buy one, you need to know what you are getting into. This is not a phalaenopsis that sits quietly on a windowsill. It is a vigorous, spreading plant that will eventually take over a basket or mount if you let it.
Natural Habitat And Growth Habit
In the wild, bulbophyllum lobbii grows as an epiphyte high in the canopy of lowland forests. It clings to tree bark with thick, creeping rhizomes that produce small, oval pseudobulbs. These pseudobulbs are spaced out along the rhizome, which means the plant spreads horizontally rather than growing upward.
Each pseudobulb produces a single, thick, leathery leaf at its top. The leaves are a deep, glossy green and can get quite large, sometimes reaching 20 centimeters in length. The growth pattern is sequential, so you will see new growths emerging from the front of the rhizome while the older back bulbs eventually lose their leaves.
Why The Flowers Smell Like Rotting Fruit
The flower is the main event here. A single inflorescence emerges from the base of the mature pseudobulb and can hold one to three large flowers. Each flower can be up to 10 centimeters across, which is massive for this genus. The sepals are long, pointed, and often a pale yellow or greenish color, heavily spotted with maroon or purple.
The lip (the central petal) is tiny in comparison, but it moves on a hinge. When a fly lands on it, the lip tips forward, throwing the insect onto the column. This is a pollination trick. The scent, which is often described as “carrion-like,” is specifically designed to attract blowflies and flesh flies. It is not overpowering, but it is noticeable, especially in a closed room.
Ideal Growing Conditions For Bulbophyllum Lobbii
If you want to replicate the jungle conditions this plant loves, you need to focus on three things: warmth, humidity, and air movement. Getting these right will prevent most of the common problems like rot and failed blooms.
Light Requirements
This orchid does not like direct, harsh sunlight. In its natural habitat, it grows under the dappled shade of the forest canopy. At home, you should provide bright, filtered light.
- An east-facing window is often perfect.
- A south or west window needs a sheer curtain to diffuse the light.
- If you use grow lights, aim for 12 to 14 hours of light per day.
- The leaves should be a medium green, not dark green. If they are dark, the plant is not getting enough light to bloom.
- If the leaves turn yellow or get scorched patches, the light is too intense.
Temperature And Humidity
As a lowland species, bulbophyllum lobbii prefers warm conditions year-round. It does not need a cool rest period to trigger flowering, which makes it easier to grow in a heated home.
- Daytime temperatures should be between 75°F and 85°F (24°C to 29°C).
- Nighttime temperatures should not drop below 60°F (15°C).
- Humidity should be high, ideally between 60% and 80%.
- If your home is dry, use a humidifier or place the pot on a tray of wet pebbles.
- Do not let the plant sit in a drafty spot or near an air conditioning vent.
Air Circulation Is Non-Negotiable
High humidity without air movement is a recipe for fungal infections. You need to keep the air moving around the leaves and the potting medium. A small oscillating fan set on low, placed a few feet away from the plant, works wonders. This also helps the flowers last a bit longer and keeps the scent from becoming too concentrated.
Potting And Mounting Options
Because of its creeping rhizome, you have two main choices for growing this orchid: a pot or a mount. Each method has its pros and cons, and your choice will affect how often you need to water.
Growing In Pots
If you choose a pot, do not use a standard orchid pot with fine bark. This plant likes its roots to stay moist but not soggy. A mix of medium-grade bark, perlite, and sphagnum moss works well.
- Choose a wide, shallow pot. The rhizome needs room to spread horizontally.
- Place a layer of drainage material at the bottom, like clay pebbles.
- Position the plant so the oldest pseudobulbs are against the back edge of the pot.
- Cover the roots with the mix, but leave the rhizome itself exposed to the air.
- Do not bury the pseudobulbs; they will rot if they are kept wet.
Mounting On Bark Or Plaques
Mounting is the most natural way to grow bulbophyllum lobbii. It mimics how the plant grows in the wild, clinging to tree bark. This method requires more frequent watering, but it often produces healthier roots.
- Use a piece of cork bark or a tree fern slab.
- Soak the mount in water overnight before attaching the plant.
- Place a small pad of sphagnum moss between the rhizome and the mount.
- Secure the plant with fishing line or soft plant ties.
- Water daily in the summer and every other day in the winter.
Watering And Fertilizing Schedule
Watering is where most people kill this orchid. It is a thirsty plant, but it hates standing water. The key is to water heavily, then let the medium dry out slightly before watering again.
When To Water
Stick your finger into the potting mix. If it feels damp, wait. If it feels barely moist, water it. During the active growing season (spring and summer), you might need to water every 3 to 4 days. In the winter, when growth slows down, you can reduce watering to once a week.
If the plant is mounted, you will need to water it every day. The roots will turn a silvery-green color when they are dry and a bright green when they are wet. Use this as your visual cue.
Fertilizer Needs
This orchid is a moderate feeder. Too much fertilizer will burn the sensitive roots, and too little will result in weak growth.
- Use a balanced orchid fertilizer, like a 20-20-20, at quarter strength.
- Apply the fertilizer every other watering during the growing season.
- Flush the pot with plain water once a month to wash out salt buildup.
- Stop fertilizing completely during the winter months.
- If you use rainwater or reverse osmosis water, add a calcium-magnesium supplement.
How To Encourage Blooming
Getting bulbophyllum lobbii to flower is not about stress or temperature drops. It is about consistency and light. If you provide the right conditions, it will usually bloom in the late spring or early summer.
Light Is The Trigger
The most common reason for a lack of blooms is insufficient light. The plant grows fine in low light, but it will not expend energy on flowers. Move it to a brighter spot, but keep it out of direct sun. You want the light intensity to be high enough that the leaves feel slightly warm to the touch, but not hot.
Mature Size Matters
Seedlings or recently divided plants will not bloom. You need a mature plant with at least six to eight pseudobulbs. Do not divide the plant unless it is absolutely necessary. The more crowded the rhizome, the more likely it is to produce flowers.
Patience With New Growths
Flower spikes usually emerge from the newest, most mature pseudobulbs. If you see a new growth starting, do not move the plant. Sudden changes in environment can cause the developing bud to blast (dry up and fall off). Keep the conditions stable.
Common Pests And Problems
Even with perfect care, you might run into a few issues. Here is how to identify and fix the most common problems with this species.
Mealybugs And Scale
These pests love to hide in the crevices between the pseudobulbs and the rhizome. Check the plant regularly, especially the undersides of the leaves.
- Use a cotton swab dipped in rubbing alcohol to remove visible pests.
- Spray the entire plant with horticultural oil or neem oil.
- Repeat the treatment every 5 to 7 days for three weeks.
- Isolate the plant to prevent the pests from spreading.
Root Rot
If the pseudobulbs start to turn yellow and mushy, you are overwatering. The roots have likely died and are rotting in the pot.
- Remove the plant from the pot immediately.
- Cut away all dead, brown, and mushy roots with sterilized scissors.
- Dust the cuts with cinnamon powder or a fungicide.
- Repot into fresh, dry medium.
- Wait 5 to 7 days before watering to allow the wounds to callus over.
Leaf Spotting
Brown or black spots on the leaves usually indicate a fungal issue, often caused by water sitting on the foliage overnight. Water the plant in the morning so the leaves dry by evening. Improve air circulation and avoid splashing the leaves when you water.
Propagation And Division
If your plant has outgrown its space, you can divide it. This is best done in the spring when the plant is actively growing. It is a simple process, but you must be careful not to damage the rhizome.
- Remove the plant from its pot or mount.
- Find a section of the rhizome with at least three to four healthy pseudobulbs.
- Use a sterile knife to cut the rhizome cleanly.
- Dust the cut ends with sulfur powder to prevent infection.
- Pot up each division in its own container.
- Keep the new divisions in a shadier, more humid spot for a few weeks.
Frequently Asked Questions
Is the fragrance of this orchid really that bad?
It is subjective. The scent is not as strong as some other bulbophyllums, but it is definitely noticeable. It smells like overripe fruit or damp earth. If you are sensitive to smells, keep it in a well-ventilated room or near an open window.
Can I grow this orchid in a terrarium?
Yes, a large terrarium or a greenhouse cabinet works very well. The high humidity and stable temperatures are ideal. However, the plant grows large, so you will need a big enclosure. Make sure you have a small fan inside for air movement.
How long do the flowers last?
Individual flowers typically last for about 5 to 7 days. However, since the plant can produce multiple spikes over a few weeks, the total blooming period can last for a month or more.
Why are the new leaves coming in wrinkled?
Wrinkled leaves usually indicate a lack of water or low humidity. The plant is losing more moisture through the leaves than it is taking up through the roots. Increase the humidity and check the root system for damage.
Does it need a winter rest?
No. Unlike some other orchids, this species does not require a dry winter rest. You should reduce watering slightly and stop fertilizing, but the plant should never dry out completely.
Final Care Checklist
To sum it all up, here is a quick reference list to keep your plant thriving. Print this out or save it to your phone for a quick reminder.
- Provide bright, indirect light for 12 to 14 hours a day.
- Keep temperatures warm, between 75°F and 85°F.
- Maintain humidity above 60%.
- Water when the medium is barely moist, usually every 3 to 4 days.
- Fertilize at quarter strength every other week during growth.
- Repot every 2 to 3 years or when the rhizome reaches the pot edge.
- Do not bury the rhizome or pseudobulbs.
- Keep a fan on low for air circulation.
Growing this orchid is a rewarding challenge. It is not a plant you can ignore, but the payoff is a flower so bizarre and beautiful that it makes all the effort worth it. Just be prepared for the smell, and give it the warmth and humidity it craves. With a little patience, you will be rewarded with one of the most unique blooms in the orchid world.
Remember, this plant is a heavy feeder and a thirsty one, but it is also very forgiving if you adjust your care routine quickly. Watch your watering habits, keep an eye on the new growth, and do not be afraid to mount it if you are tired of potting. The rhizome will thank you for the extra air flow. And if you notice the leaves looking a bit dull, wipe them down with a damp cloth to keep the pores open for gas exchange.
One last tip: when the flower spike first appears, do not move the plant to show it off. The sudden change in light or temperature can cause the bud to abort. Wait until the flower is fully open and the sepals have stiffened before you relocate it for display. This small patience will save you from a lot of dissapointment.