The exception being Tea roses, China roses, Noisettes and Species from tropical climates. I hear that own-root roses are disease free. Own-root roses are just as disease free or disease prone as the same variety in a grafted bush. We test the roses we offer in our gardens and strive to offer the best. Roses may be grown in most climates without spraying if you don t mind a few blemishes.
Southern areas are more blackspot prone.
My rose has grown a lot but has not bloomed. Extra vigorous varieties, also climbers and ramblers may put all their energy into growth the first year or two and not bloom until the second or even third year. The major cause for this after the first year is over fertilizing. While aphids may be disposed of by using insecticides, there are alternatives. Knock them off the plant with a strong spray of water.