Yes, RpR, with roses you would certainly have to stay on top of disease/insect problems with they amount of fertilizer your purport. Another reason why I also would not recommend such a high dose.
Obviously, through the decades you have found what seems to work for you, but the Thread OP is new to growing roses. Roses in Tennessee are more easily prone to disease and insects than in Minnesota. I don't think he/she is ready to take on a schedule of disease and insect prevention applications.
