RQS Royal Jack Automatic first grow

The bottom leavesgoing yellow is from lack of nitrogen. Which in bulking you don't want a lot of nitrogen, it hinders bud development. So I would not worry about the slight yellowing at the very bottom. The discoloration on top and rest looks like first stage of potassium deficiency. It is not excess nutrition because in excess the tips turn brown and curl up and in. Your tips are brown and straight with leaf discoloration in canopy in areas. Plus being in bulking the plant wants a lot of phosphorus and potassium to develop the flowers. Flowering npk ratio is 1-2-3. So between looks and facts I think it wants more potassium. Since it is not available it's drawing it from the leaf tips, and pigment in upper canopy areas. IMO