Oh! Good info to know! Lady of Shalott is another one I wanted.
We're considered zone 7 but last winter we had a few nights that went down to 17 below, with no snow cover. It hasn't been that cold in many years, though. Even parts of central oklahoma were that cold last year.
The Austins made it through the winter better than some of my Bucks. All were grown the same...i.e., equally neglected.