Since my rose bush didn't bloom this past summer, should I still prune it back this fall or wait until next spring?
Pruning Rose Bushes
Here are some articles for you on this subject:
In some cases with grafted rosebushes, the top and desired part of the rosebush dies and the hardy root stock it was grafted to takes over. This can be the case when rosebushes do not bloom all season long. If this has happened it is time to dig them out and replace them with rosebushes you desire to grow.