Check out this thread where Latewood and I recently go over the various ways to tell if your plant is finished, and some details of why what means what:
Keep an eye on those trichomes. What a lot of white hairs mean, or could mean, is new calyx/bud/pistol development. In other words the buds could still be growing and swelling. This is why some people wait for nearly 100%, or actually the full 100%, of the “hairs” to have turned the orange/brown before they actually harvest. But this might be a bit too long for some strains and too many of the trichomes may have degraded to amber and this might mean couch lock or a too sedative like of a buzz. S…
~MacG