hi, ed. i think that the same strategy applies for mounted plants going into s/h that apply for potted plants going into s/h: make sure the roots are actively growing before putting into new medium. as far as getting plants off of mounts go, some people tie the plant onto the mount, and some people use a dab of glue. you can just untie the plant in the first case. in the second, i would carefully pry the plant off of the mount, leaving the glue on the plant instead of the mount. that way, you dont hurt the plant and leave an opening for bacteria, etc.