Yellow leaves at the end of flowering, should I worry?

Plant is coming to the end of its life and I using up the nutrients stored in the leaves. Same as when the trees leaves turn brown and fall off in the autumn. I can see your not feeding your plant very much anyway so from this point try and feed with only water to help the plant flush out as much of the nutrient stored in the leave as possible. The yellower those leaves are at harvest the better the smoke with be. Good Luck Bro 💪