Getting it to bloom

Why won't my Mule-Ear Oncidium bloom? (and how to make it flower)

Also called Lance-Leaf Oncidium (Oncidium lanceanum).

More about mule-ear oncidium

About Mule-Ear Oncidium

Oncidium lanceanum · also called Lance-Leaf Oncidium · flowering

Oncidium lanceanum is a warm-growing, nearly pseudobulbless 'mule-ear' species with thick, leathery, purple-spotted leaves and richly fragrant spotted-brown flowers with a rose-purple lip. Native to humid lowland South America, it demands warmth, high humidity and bright light, and is best mounted or grown in a fast-draining basket rather than a deep pot.

Plant type: flowering

Watch for — Failure to flower: Insufficient light and warmth suppress its showy spikes. Give it the brightest indirect spot you can without scorch and keep nights warm; it is a true lowland warm grower.

The reasons mule-ear oncidium isn't blooming

Almost every non-blooming mule-ear oncidium 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 mule-ear oncidium 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 mule-ear oncidium to flower

Maximise sun. Give mule-ear oncidium 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 mule-ear oncidium and get the feeding right with the mule-ear oncidium 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

Mule-Ear Oncidium 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 mule-ear oncidium care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Mule-Ear Oncidium blooming — frequently asked questions

Why won't my mule-ear oncidium flower?

Mule-Ear Oncidium 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 mule-ear oncidium bloom?

Give mule-ear oncidium 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 mule-ear oncidium normally bloom?