Hello, I have 2 of the John Cabot climbing roses. We have had them in the yard growing & blooming beautifully for the past 17 years. The last 2 years they have bloomed late and sparsely. In the past by this time of year they have been starting to bloom continuously - not even close this year! I do prune out old & dried canes every year. And I do use a rose fertilizer in the spring with feeding every couple of weeks when blooming. When pruning this year some of the older "stems" seem to be rotting out. So, do plants like this have a life expectancy? I'm thinking the best way to solve this issue is to replace them -- ?? I've looked at other climbers - William Baffin and Ramblin Red besides the John Cabot. Any advice would be very much appreciated -- I loved those John Cabot roses!