I am not an expert on growing orchids but I have gotten some to rebloom indoors. I grow the butterfly orchids phalenopsis as they are the easiest and I use Osmocote Plus because it has macro and micro nutrients with trace elements. I apply the fertilizer every six months. I have also learned not to overwater my orchids and not to let them dry out. For my home conditions that means I water about once a week. Keep growing, Marianne Binetti