Zepherine is a gorgeous rose! It also is one of the few roses that will grow in shade. About pruning, do you want to keep it in bounds, or encourage growth? Keeping in bounds, cut "growth canes" which are the long, arching canes that don't bear roses. For encouraging growth, cut any cane just above a leaf bud, as long as the bud is facing out, and not facing the interior of the bush. Of course, any dead wood should be removed, and any canes that cross and rub against each other. When we lived in upstate NY, which is New England wannabe, we pruned roses in April when growth started to appear (you know, those cute little red bumps on the stems) but you'll have to use your judgement about when to prune. If you've had this rose for 22 years, you sure are doing something right!
Thank you @marlingardener. Yes, I love this rose. We don't have fun sun anywhere on our property, so I am very pleased that this rose can deal with less than ideal conditions. I would like to encourage growth. I suspect it will start growing again in April sometime. It blooms in June. Thanks for your advice. I'll see if I can post a photo @Netty Oops nope. File is too big. I have begun using a different setting when I take photos so I can post them here, but I took this photo back in 2017.
@Cayuga Morning what a beautiful rose just saw stunning pictures of them and besides MG's sound advice I don't know if this link is any good besides http://hartwoodroses.blogspot.com/2011/04/pruning-zephirine-drouhin.html
SJ, I am ashamed to say that what I have been giving this rose is total neglect! I do weed around it (the myrtle creeps in on it), & cut out dead branches, but that's about it. I'll add it yo the list of plants to fertilize. With all this sudden TLC, Rosa Zephirine won't know what's happening to it!