Leaves yellowing in week 12??

This is totally normal and a signal that her time is almost up! What’s happening is the plant is using the stored nutrients in her leaves! Most growers prefer this to happen because it drains the plants of stored nutrients and gives the buds a much smoother taste and smoke. I always cut off nutrients about 2 weeks before harvest and let the plant use what’s left in the leaves! The only thing I could recommend is defoliating the yellow leaves that are starting to die. This will help prevent mold from attacking the dead leaves. Yellow leaves are fine but it’s once they start to become dry and crispy that you want to remove. At this point typically the leaf will fall off with a small tug or even just by touching it which basically means the plant was already working on shedding that leaf, you just gave her a push! From here on I’d just keep a good eye on her trichomes and pistils now! Good luck! 😎🤙