From what I read on the U of Fl website, excessive moisture is the cause of snow mold. I have watered my orchids very little this winter, an occasional misting is all. When I recently removed some pots from the greenhouse, I noticed some had what appears to be snow mold. I would appreciate any suggestions of thoughts regarding snow mold.
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To my best recollection, snow mold is restricted to northern latitudes. I think you just have white fungus I get in my terrarium. I treat the "sticks" plants are growing on to a shower of physan 20 every once in a while which seems to controll it quite well. Before you get too exicited, I would try a couple squirts of Physan 20 and see if it goes away.