if you dont have any clear trichs then it is ready, my phenotype does get a little amber but some phenotypes of this do not get amber, remember when you grow from seed you roll the dice, amber is rare in mother nature, when people talk about going for a lot of amber they are talking about cloned strains that they know turn amber, to harvest you look for all trichs to be OPAQUE or AMBER with bulbous heads - I harvest my NL from nirvana at 9 to 10 weeks - stop reading forum information because people tend to read between the lines - AMBER IS RARE WHEN COMING FROM SEEDS - Take your best from seed plants and CLONE THEM! Look for all signs of maturity - swollen calyx - receded pistols - high resin and terpine production