Durban Poison Auto #2

This little lady seems to be doing alright for the most part. She is tall and had a lot of buds on her. She seems to be taking much longer than the other Durban in the tent to beef up some but maybe its due to the height of her. Some of her older and lower fan leaves are turning yellow and I am not sure if its from the nutrients or if this is a normal thing for her. Im not really slamming her with nutrients so maybe I am still giving her to much nutrients or I am washing away the nutrients when I just do water? Maybe she isnt getting enough nitrogen or to much or it? Not really sure. Besides the yellowing of the leaves she seems to be chugging along nicely. I would like to see her put on more weight this coming week so fingers crossed on that. Hope everyone is enjoying their grows. Happy Growing everyone!