Question
I live at nearly 7000' in Northwest Wyoming. We often have several weeks of -30?nights in the dead of winter. Usually there is several feet of snow on the ground then, but not always. I want to plant some roses. My wife bought some hybrid tea roses the other day. Here's the questions: Will I need to bring these roses in when it gets cold in the fall? Should I plant these on the south and west side of the house where it stays just a little warmer but the snow is not as deep? What variety of rose would be better suited to our climate?

Answer
Most hybrid teas do well in zone 6 ( you are in zone4) with just compost or some soil mounded over them for the winter. However when you get to zone 4  most will complain about your winter. To make sure they survive, you can of course simply grow the roses in pots and then bring them on for the winter.
The good news is that there are roses that are specifically bred for zones 4 and 3. Most of the Explorer Series from the Dept of Agriculture in Canada, do okay in deep cold. Some of the old garden classes such as the Albas, Damasks, Gallicas and Rugosas will tolerate extreme cold.
In your area roses will do better if not planted in the warmest part of the garden. The reason for this is that sometimes these areas will warm up quicker than others, the roses start to activate into growth and then they get a blast of cold and that kills the rose plant. A west side would be the best to plant a tender rose in. All others can go where you want them to grow. One of the best ways to find out just what is hardy where you garden is to see what the local nursery brings in as they won't spend money of roses which would die. If no one sells roses then Roses Unlimited carries a good selection of bare roots. I have never dealt with them but they always get good reports on the rose forums. Also cold hardy roses are usually grown on their own roots so even if they die back to the soil line they will grow again when it warms up. If grafted when the rose under stock is frozen, then there is no way they will grow back again. Pickering in Canada carries the old garden roses and are well known and respected. Hope this helps.

http://www.pickeringnurseries.com/

http://www.rosesunlimitedownroot.com/