Mounting orchids for the first time

[mofms1]

I bought two bare-root orchids from a show a few weeks ago. The roots were wrapped in some kind of fiber (maybe coconut fiber) and there was a small piece of sponge in the center of the roots. The types of orchids were BLC and Polystachya Paniculata.

I have since mounted the Polystachya Paniculata on Tree Fern and hung it in my bathroom where it will get filtered NE (filtered through the blinds which are mostly closed for privacy) sun, and I can spritz the roots one or two times a day. I did put some sphagnum moss over the roots, but even that dries out over the course of a day. I'm not sure if it's thick enough to keep the roots damp, but also don't want to put on so much that it will rot the roots. It seems to be a very young plant and the roots are maybe only 1-2 inches long and there aren't many. Should I wait to mount this plant and give it a bit more time to grow? If the roots are dry by the morning and at night with me spraying it twice a day, should I add more moss if I keep it mounted?

I haven't mounted the BLC yet but would like to do so this weekend if it doesn't need more time to grow. I already have a Tree Fern to mount it to, and a place picked out to hang it, by the windows in my breakfast nook. It will receive shaded southern sun. I have two store-bought, potted orchids growing really well in the same location. The roots on the BLC are also not very long (1-2 inches) but they are thick and seem really healthy. They are in a little jar now, there is no standing water, but they seem to retain their moisture for about 2 days before they need a spritz or dip in water. Should I wait to mount this? When I mount it should I put sphagnum moss over it? If so, how thick should I layer the moss?

Any advice would be appreciated and thank you ahead of time for your help.