You can't see anything to tell if they are done? Are the trichomes clear, cloudy, amber? Are the pistils going orange/brown, are they retracting? Anyway the strain etc..... have you searched for others on RIU growing the same strain and how long they took to finish? Anyway I'm sure the experts will be along soon with actual help. I'm still far to new, only just finished my first grow, so I'm not someone to rely on for information.