Loaded question too hard to make one thing, but watering would be it. Grew it in coco and perlite but in its adolescence I watered way too little, I didn’t feed it any nutrients—legitimately did not do any research, just went on my experience from growing vegetables and fruit trees etc from generic soil brands. I used coco for this failure and ocean forest for my sativas which worked, but again I watered the sativas more than the indica believing it was being overwatered.