many strains re-act to the flowering cycle differently, in my experience. some will just burst out fat thick buds from the start (super skunk is doing it right now). others will slowly grow and fill in at a even pace (og kush is doing it right now). then there are the ones that go in waves. just when you think they might look close, BOOM a whole new wave of growth ( i try to avoid these they drive me crazy). so if you watch closely you may be able to establish their pattern.