hey there, the pistils are actually not a perfect way to figure things out, why ? first of all after the chop all the pistils turn brown anyway. Second, every genetic is quite different, some gens get brown pistills pretty early others never really get brown pistils, and same with the trychomes, some strains get amber others dont really ever get amber. for example my gorilla never really got brown pistills or amber trychs even after four months ! yeah i know this isnt the easy answer you're looking for but it's the truth at least ! and it gets worse : max THC is when the trichomes are fully milky no ambers. ambers/hazels mean that the trichome has been oxidised and the magic juice has less THC and more CBN/CBD... so it really depends what you're going for : max THC or a mixed/balanced high with some body high / couch lock effects. Again not the simple answer you're looking for but it's the truth. I'm always looking for max THC, others are looking for max couch lock ... its a matter of taste ! hope this helps ! š