Getting it to bloom

Why won't my Bulbophyllum vaginatum bloom? (and how to make it flower)

Also called Sheath Bulbophyllum (Bulbophyllum vaginatum).

More about bulbophyllum vaginatum

About Bulbophyllum vaginatum

Bulbophyllum vaginatum · also called Sheath Bulbophyllum · flowering

Bulbophyllum vaginatum is a Southeast Asian epiphytic orchid that forms long creeping rhizomes with widely spaced pseudobulbs. It produces fan-shaped umbels of yellow flowers with long, thread-like trailing sepals, often triggered by sudden temperature drops. A vigorous mounter that needs warmth, high humidity, bright shade and excellent air movement to flourish.

Plant type: flowering

Watch for — Failure to flower: Often needs a brief night-temperature drop to initiate spikes; provide a 5-8°C seasonal dip and bright light.

The reasons bulbophyllum vaginatum isn't blooming

Almost every non-blooming bulbophyllum vaginatum traces back to one of these, roughly in order of how common they are:

Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
The plant has not been deadheaded, so it stops flowering once it sets seed.
Irregular watering — drought or waterlogging at the budding stage makes buds abort.
It is still too young or was checked by a transplant and is rebuilding before flowering.

Feeding bulbophyllum vaginatum a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.

The fix — how to get bulbophyllum vaginatum to flower

Maximise sun. Give bulbophyllum vaginatum the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.

Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for bulbophyllum vaginatum and get the feeding right with the bulbophyllum vaginatum fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.

Bloom season and what to expect

Bulbophyllum vaginatum flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.

Post-bloom care so it flowers again

Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.

For everything else this plant needs day to day, see the full bulbophyllum vaginatum care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Bulbophyllum vaginatum blooming — frequently asked questions

Why won't my bulbophyllum vaginatum flower?

Bulbophyllum vaginatum blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.

How do I make bulbophyllum vaginatum bloom?

Give bulbophyllum vaginatum the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.

When does bulbophyllum vaginatum normally bloom?