1) big colas are a combination of exact nutrients,perfect light ,humidity , temperature and basically being a fycking master ,
2) the more lst you do the longer it takes , I wouldn’t mess about after the white hairs appear , but if you defoiliate make sure you leave 1 inch of stem attached or you will get rot if you unlucky , I’d say you got 6 weeks , mayb3 more. 👍