It's all a matter of strain and the light hitting the plant. One of my buddies up in central Vermont already took down some plants! I was like, hey no shit! But you'll see that with some lines. As for the late ones, that's also normal in some strains- BUT if you are growing a plant inappropriate for your climate, like one that is slow to show and slow to finish, you might have a problem when you run up against the frost. What are the strains?