A woman in my orchid society told me to try growing my oncidiuims in sphagnum moss. I tried a couple and they seemed to do well. Now I think I'm seeing fungus on the pb's? I do have them in plastic rather than clay pots, and they might be planted too deep into the sphagnum. I keep the humidity about 60% with fans 24/7. And I've only noticed it on the indoor onc's. Thought I'd see what ya'll thought before I put them back into bark.
Lisa