On a guess at least 2-3 weeks. I started by using the tricomes colors but after some more experienced folks on here advices to go by the pistils when they change color and start curling back into the buds and I was pleasantly surprised when I noticed how much they bulked up in those final weeks. Now I don’t look at tricomes at all. Don’t get me wrong even harvesting a bit early is still going to be some great smoke and some like to harvest early it’s a bit different buzz then if let go longer.
when I did go by tricomes I would wait till I at least seen some ambers. You could harvest some tops and let the lowers mature more it’s all up to you so try some sooner then some later and see what you prefer and go by that.