I would love to say that I have actual experience growing this rose, but most of my rose growing experience has been in Southern California! However, I decided to see if I could help you with some research. Instead of searching for rosarians in the United States, I did a Google search for the Canandian Rose Society. I had a hunch they had a lot more eperience with growing roses in colder zones than I do. They do list roses by growing zones and that can give you an indication of the hardiness of the cultivar you select. I did not see 'Orange Velvet' on any of their lists. However, in regards to your statement about roses with orange, yellow or red in them, several roses were listed as sufficiently hardy. Here's the link:

http://www.canadianrosesociety.org/

Good luck with your roses.

Lyn

I have a climbing orange velvet in the front yard. It has grown well and has been in the ground for about 4 years now. Some of the canes are about 10 to 12 feet long. I've had to cut it back because it is growing too close to the lawn and can be lethal when mowing the yard. It really should be planted where it will get more sun. The neighbors have an olive tree shading it. It performed best last spring and Fall. The blooms are truly an orange shade. I live in Phoenix where it has been over 100 degrees for the past couple of months, so it is just trying to get thru the summer right now. The only regret I have is that I was new to growing roses when I planted it and a climber really need to be trained over an arbor or down a wall to bloom well. Hope this helps.