One of the most common reasons for roses not blooming well is the use of high nitrogen foods or fertilizers or the over use of them. The rose bushes tend to generate a lot of foliage and very few to no blooms at all. Use a well balanced food or fertilizer when feeding your roses so that all of the rose’s nutritional needs are met.
Rose bushes will from time to time push out canes that are called “blind shoots.” Blind shoots look like typically healthy rose canes but will not form buds and will not bloom. The cause of blind shoots is not really known but variations in climate may well have something to do with it, along with over fertilization and lack of enough sunlight. The problem with blind shoots is that they will look like a typical and healthy cane. The only difference is that they will not form buds and blooms.