A pH of 4.8 is much to low for a soil grow. That tells us something. Too much fert. Even using the ferts you have without using the additional P ferts, I suspect might be too much. I didn't think it was overfert initially because usually overfert shows leaf tips turning yellow, then brown, then the rest of the leaf turns yellow and brown. You have those colors, but you also have areas that stayed green. This was a good one, however, because people can learn from this. I wonder if you water with some pH up, if that might make a difference.