We've had a rose for at least 20 years. It might be centifloria, having peony-like pink flowers, very fragrant, and a lot of thorns. It recently went through several years of neglect, struggling to grow amidst weeds. Weeds have been cleared out this year and it seems to be doing well as far as the foilage. However, no blooms. I applied bone meal in May. I looked for five-leaf clusters above which to prune, but found none. All clusters are 7- or 9- leaf. Should I just be patient and wait until later this year or next year, given the previous years of neglect? Or should I prune above any of the 7-leaf clusters? I don't think the current branches are suckers. I did fertilize it today with a Bayer product (combo disease,pest and fertlizer solution)

I wouldn't prune until Winter time dormancy and then I would prune hard to make it rebranch next year.

There is no Rosa centifloria. If you mean centifolia, it's a once-bloomer and oneeyeluke's advice will guarantee that you'll never see it bloom. Once-bloomers have to be pruned immediately after they bloom. Winter pruning will cut off all of the wood and buds that would have made spring blooming possible.

Forget about pruning until next year after it blooms. Don't look for five-leaf clusters. A centifolia probably won't have any.

What Zuzu said.