I've started growing a lot of Pioneer roses here in zone 5 Nebraska and they as a whole do pretty well. Thomas Affleck has survived about 4 winters with a little surviving cane so I'm pretty sure he would have surviving roots with a little soil mounding and better snow cover. Cole's Settlement is only two years old and didn't have any surviving cane so his limit might be zone 5. I haven't been able to overwinter Star of the Republic more than one winter so I think it's marginal in zone 5, but it's a young plant and might be better with age. Pioneer roses that I haven't been able to overwinter at all include Mier Y Tieran and Lady Pamela Carol, as well as a few others that I can't call to mind at the moment. Belinda's Blush has definitely died to the ground and we'll see if she comes back in spring - first winter so far.

Good bets would be the delightful Rockwall Sesquicentennial that is mostly cane hardy and blooms most of the summer. I loved Field Roebuck and it lasted a couple of years in a non-optimum spot, so I think with better placement it will do well. Out of stock but I'm eager to replace it! Doreen's Centennial is several years old but it dies to the ground and only barrrrely came back from the winter last year with plenty of snow cover, so I wouldn't try it farther north.

Bottom line is that most of the Pioneer series are rated to zone 5 in the ARE catalog so they're definitely worth a try further north on the sunny side of your house. We'll look forward to hearing about them.

Cynthia