If you look up your strain they tell you when they typically flower, but the best bet is to get a small hand held light microscope so you can inspect the trichomes, you want to see like 90 percent milky heads. They will look like little mushrooms, when theyre young theyre chrystal clear. As they mature and develop to become more potent they will turn milky hazy white, you will see some turn amber which means theyve aged a little too long and will begin breaking down much faster. Another cool thing about when you harvest is younger is speedier head high and older is more couch lock heavy but it fleets faster. You can also keep an eye on the hairs that come out they will start to burn orange/red and look like they are dying off curling slightly. Best bet again is the trichomes as they tell you how far along the bud is. Good question esso, if you have anymore id love to help you. At least with all the knowledge I have as we all should.
