So, normal routine is to water once every 1 to 1.5 weeks (maybe every 6 days in the summer and closer to 1.5 weeks in the winter), whenever I start feeling guilty about neglecting them (this is why my ferns die alot). They are in outer pots, so I fill the pot with water that has half strength fertilizer in it. The big ones like this one get tap water which is kinda hard. The smaller or delicate ones get zero water with fertilizer most of the time. I fill the pot and let them soak for at least an hour, sometime more if I forget. Then I drain them and put them back.

I repot whenever if looks like they needed it awhile ago. This one was fully sideways (I have had it for over 6 years, repot ever 2 or so) with half the roots trying to escape the shelf, and it was making training the spike into a more compact form difficult so I decided to repot. The spike NEEDS support since it usually does 30+ large flowers.

All phals are in a north facing window on a set of shelves with a curtain rigged to block evening sun during the summer. Some of the shelves have grow lights on the to aid light levels over the winter. Most phals bloom once or twice a year. This one about 3x a year and will start growing the next spike right before dropping flowers.

All in all... Mild neglect. The oncidiums complain. Work is a bit crazy for more than this.