Im on my second grow, so im not too knowledgeable, id wait for someone more experienced to comment, but as far as what i know/do, i wait till i see the very first amber trichome and then harvest, i hear amber means more cbn/cbd or something, and milky white means high thc. so i just wait till i see the very first amber trichome and then put into 3 days of darkness. or thats how i did my first run atleast. had a decent turnout! But yeah, id wait for more experience to comment, just wanted to give my best knowledge. plants are looking good for a first man!