My best suggestion is terrarium conditions with lots of air movement. I have used a translucent plastic storage tub, a computer fan inside for air circulation, light a little less than for a healthy adult plant (the translucent plastic accomplishes this without any special lighting). Live moss is ideal, but sphagnum is acceptable. If you can find a way, suspend the rhizome just at the surface of the moss, not in it. I usually maintain a tub with live moss for use as an intensive care unit. For some reason it seems that having a couple healthy foliage plants in the tub/terrarium too is helpful, especially if you don't have a live moss bed. Good luck.