They called for 7-8 weeks. I harvested in between the 9-10 week usually they were ready from day 65 to 70. The trichromes swelled along with the calyxs and I harvested when I began seeing an abudant amount of trichs turning cloudy. Since the plants were indica dominant, I did not want to find myself napping after a couple hours, so I looked for mostly clear bubble heads and some cloudy. At this point they should have the most THC before starting in on the CBD. Once they start clouding up then THC ratios begin to decline. Of course this is all of personal choice, some people like more of the couchlock effect(cloudy and amber trichs), that just won't work for me.