I think all the epiphytes have a period of rest when they stop growing and need drier conditions. *It would be better to say less wet, since I always maintain some moisture. *Once the epi's get established in the live LFS I use, they begin putting out stolons that reach out of the pot. *I enclise these in loose strands of live LFS and after a bit new leaves emerge from the stolons. *My moss always remains alive even in dormancy, although I allow the more dense potted material to remain out of tray water. *I mist well daily and this leeps the moss alive, and provides the aeration needed while still keeping moisture available for the stolons which seem to continue to grow even if no leaves are being made. *The actual pots I allow the moss to dry to a non living state at their surface.....just. *As soon as I spot a new leaf growing, I slowly begin to increase the wetness in the pots ending up with the perforated pots in tray water for the growing period.
Of all the epiphytes, U. alpina has proved the least tempermental.