How long your plant grows for will be different than the breeders recommendation. Seedsman says 49-63 days, but it looks like you have quite a bit longer to go. Different phenotypes, genetics, and your grow system can all effect breeders harvest times. I always plan to add 1-2 weeks to that number. There is no darkening of pistils, they are still shooting strait up and the calyx's haven't swollen up either. I say you have more like 4 weeks rather than 2. Buds put on a good amount of weight during the last 2 weeks. Don't rush the harvest and keep her healthy through the rest of the grow.👊