Thanks, the heat mat sounds like a good suggestion. I should note that away from the window sills the range is probably more like 17-22C, but as you said the sphagnum itself might cause a few degrees drop. Also, that's the winter range (nov-march or so); I don't have AC so the summer temperatures are much warmer, probably 22-29C, often with humidity, being close to the ocean and having a fairly wet climate.
My larger phals do pretty well in that environment (in bark mix). They tend to produce a lot of new growth during those warm/humid months, with a few spiking/blooming, then I tend to get a lot of spikes and blooms starting in the fall through late winter, with more limited growth.
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Hybrid Mode
