Oncidium blooming trigger

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"Oncidium" means a lot of different things. Just in the genus Oncidium, as currently understood by taxonimists, there are species from many different elevations and climate regimes.

If we expand to other genera in the Oncidium tribe, and all the intergeneric crosses, there are even more plants to consider.

Most species Oncidium - as currently understood, including the former genus Odontoglossum - bloom once per year. This may be spring, summer, fall or winter in different species.

Many intergeneric Oncidium tribe hybrids bloom multiple times per year, either with or as soon as they finish a new growth. Is this because they have lost mechanisms triggering blooming at certain times, or is bloom time controlled by new growth initiation? I don't know.