Cattleya with few roots
I apologize in advance for the poor photo quality and band aided finger in the picture haha. I got this i Cattleya orchid a bit over a year ago at an orchid grower and immediately de potted it to see what the state of the roots were in, and it was a good thing I did. It was mostly rotted; so much so that I had to trim off virtually all of the roots. I have had it in this ziploc bag with some sphagnum moss that I moisten every once in a while ever since. Unfortunately it has done little in the way of root growth (I have heard that I should put it in the dark so it can focus on root growth. I did not do that unfortunately). It does however have five roots or so that are about the length of the root in the image which is a about a half of an inch. I'm wondering what I can do to help it have increased root growth, and I'm wondering at what point I can choose to re pot it. Any tips?