I would suggest you chop bits at different times e.g. 8 weeks 9 weeks 10 weeks and see what high you prefer. More Clearer trichomes (8 weeks)give you a more up high .(10 weeks) more amber gives a more body couchlock high and 9 weeks is a more even head and body high.take nugs at different times and see which high you preferI have the jewlers loupe. I'm checking everyday now because I know I'm close. I'm only checking the calyxes.
-Are those photos you posted here a Sativa dominant plant?
-Why are you waiting until 25% amber as opposed to say 10% amber?
-Have you grown this strain before?
I don't know exactly when to harvest. Barney's gives absolutely no details what to look for in the Trichomes when it's time to harvest. Publishing only a range of days is not good enough. Which is the only detail they provide for harvest. Which by the way 60 days is tomorrow. 60-70 days is the range Barney's published.
So how did you decide on 25% amber?