Sphagnum or bark for Bulbophyllum rothschildianum.
I have a Bulbophyllum rothschildianum that is in desperate need of repotting (the latest two growths are hanging outside the pot). I currently have Sphagnum moss and medium bark (pieces about 0.5" to 0.75" in diameter) on hand, which should I use? It is currently in fine bark, which it seems happy in so I would rather not change it, but I don't have any of that and it might be a while before I can get some.