If you're a zone 5, although I would have thought Montana much colder, Dana Hovey should be alright.

Thanks, Harvestman.

Much of Montana is colder, but we're in what the rest of the state enviously refers to as "The Banana Belt"- a reasonably temperate region, shielded on at least a few sides from the extremes that visit the rest of the state. West Yellowstone, Browning (by East Glacier), and the northeastern part of the country we call the High Line for the NP railroad, well, they get nasty once in a while.

Thanks and best wishes,

Mark