My orchids get what they get!
No special fertilizer,some ordinary pot fertilizer, weak, now and then when I feel thay may need some extra during hevy growth.

During winter I have three different growing conditions (very moist drip wall growing cabinet, large drier growing cabinet and my windowsill.
In the summer I add one more growing zone and that is my balcony.

Depending on size of the plants I move them to the place they grow best in.

Though I have had plans to build another cabinet with cooler climate but that will have to wait some years...

/M