Its been at least 6 weeks. How much longer do you think she has left to go? And is it too late to attempt to fix the discoloration? or is this all normal? http://picwizz.com/upload/9576-4093.JPG http://www.picwizz.com/upload/9577-1011.JPG http://www.picwizz.com/upload/9578-7072.JPG
Looks like a nitrogen deficiency, I would make sure your PH is about 6.5 and if it is give her a good feed. The leaves will start to yellow natrually when she finishes her flowering but you look like you may have another 3 weeks to go or so. Not 100% on that it depends on your strain, but I would say she looks about 3 weeks out. I wouldn't expect to see leafs yellowing like that for another week or 2. Other then that she looks fantastic man. Keep it up.