I harvested by eyeball for far too long. The only way to tell is to put the trichomes under a magnifier. Buy a cheap magnifier (Amazon $20) and read up on when to harvest using magnifier to guide you. Weed magazine did a detailed article about 6 months ago. It really opened my eyes. No more guessing
I flowered for 10 weeks and my trichomes were still crystal clear with a 60x jewlers magnifying glass, I tried the 3 days of darkness and everything and
cant figure it out, so she started drying out and I chopped her anyway. She's beautiful though, purple all over, didn't even mean for that but she's literally so covered in trichs you can see thousands per square inch almost.
I flowered for 10 weeks and my trichomes were still crystal clear with a 60x jewlers magnifying glass, I tried the 3 days of darkness and everything and
cant figure it out, so she started drying out and I chopped her anyway. She's beautiful though, purple all over, didn't even mean for that but she's literally so covered in trichs you can see thousands per square inch almost.