In my experience, phals tend to be active year 'round. In fact, many of them, especially white/pink/purple hybrids, tend to be winter bloomers. They do want a ten- to fifteen degree (F) day/night temperature drop for about ten days to two weeks to initiate spiking (that usually comes about 6 to 8 weeks after that), never letting them go below about 50F. That drop is usually a natural autumn occurrance, and in the home, leaving the plant near a window (even a closed one if it's really cold outside) will do the trick.
With S/H cuture, I use shallower pots for phals, as they generally like to stay wetter, and I use relatively large diameter pots, as well, often planting young ones in pots of the same diameter as their leaf span. They seem particularly happy when they can spread those roots out.
|