Strongly genetic sativas can go 12+ weeks. That is why my big bud has me so concerned. Hell, all three have been flowering for over 8 weeks now, and two are definitely strongly genetic indicas. My big bud is supposed to be weighted pretty heavily towards indica genetics, but you sure could fool me by how it has grown this season. Long and lanky and the buds are nowhere near finished. I expect my other two to finish ripening up within the next 7 +/- days, but the big bud I am beginning to be concerned about. I might be camping outside in order to keep a plant warm, lol.