currently im on my second flowering of NL i have planned on 10 weeks this time because reading around at multipleplaces i have found that flowering took anywhere from 7-10 weeks. and the last plant deff took 10. i stopped giving my plant nutrients 2 weeks early so around day 56. then gave it one nice flush and gave it only ph adjusted water the 10 days. but as you said its to last to try and make up for that now. you plants should do fine. barring any other severe problems.