hey fruitgrower, good question, every genetic ages in different ways according to the different environment it's in. I'm guessing you're also worried because it seems early on. As you know the gens you're growing are large yielders, so they're gonna need more time whatever happens. What I say to myself is that pistills will all turn brown during the drying and curing anyway so it's not really a good indicator of when the plant's ready. Right now you've just finished the stretch for the plant which is a stage where there's a lot of action going on, now the plant is going to get buffer, and you've got a fair few weeks ahead of you yet. Sit back and mind the plants, but this stage is going to be pretty much on cruise control, so sit back and relax. hope this helps ! 🚀