Oncidiums are an orchid I have not fully explored. The big yellow one I have above grows mainly as a lithophyte in nature, on rock outcroppings and crevices where it's largely dry unless it rains. But different ones in the group behave differently. I have a few Tolumnia, the ones people used to call 'mini-oncidiums'. They like to be in a tiny clay pot with nothing.
My fave oncidium type orchids are the Colmanara Wildcats. Bi=ut I don;t grow any....because it's just overall too hot here in the summer. I had a few years ago and they all died a slow death because they just don't like 90-95F
