man im not sure about that one, i know if you keep vegging them preflower should show up when there mature, then some people flower right from seed which idk why because damn u wouldnt think there would hardly be any weed on them if i grow a plant i want to get the most amount i can get, not sure if u start to flower to see what they are dont you have to keep on flowering them or can u go back to vegging them sounds like to me they would stress out, not sure hopefully somebody else can answere this question