You're orchids seem very healthy!! Lots of nice roots. I concur with the others the temperature change should help to get a spike. Also I found that some of mine will spike at different times than others. If you haven't repotted it you might want to consider it & since you've been successful with the moss maybe stick with that. I use bark for mine but I live up here in the Northwest so with So Cals drier conditions you might find you will be watering more using the bark. Hope this helps some, just my .02 Good luck with your beautiful phal!