I have some leafless orchids to deflask(a few ghosts and a large bottle of chiloschista viridiflava) and I'm contemplating the option of deflasking them straight onto sterilise mounts inside the humidity box. I have a big stack of small treefern mounts on their way and also some other bits of stem from some native casuarina and bottle brush trees, plus some that i make out of gutter mesh and sphag. I thought maybe I could bake or boil them to sterilise them and then lay them all flat on top of the grid in the humidity box and lay the orchids with a little bit of sphag straight onto them. The idea being that they could begin attaching themselves to the mounts straight away and by the time I was thinking about transfering them out into the terrarium they should be settled and less likely to be shocked...
I am going to preface this by saying l actually know nothing about this!! BUT I think that I would try it on a couple of them even if everyone says you shouldn't...Jean
I've never done this myself but I've seen several examples on the blogs of other orchid growers. As long as you keep the humidity nice and high and constant, it shouldn't be a problem to deflask straight onto mounts with a little moss.
As you've said you'd sterilise the mount first, I can't see any difference at all between that and deflasking into a sterilised organic medium, which many growers do. As long as the other conditions are kept at an appropriate level, particularly humidity and light, I'd assume it would be fine.