Iobelle made it through our extremely harsh winter with about 50 percent dieback, while Mystic Beauty and Cymbeline died. I would say that this rose is probably hardy to Zone 5? It performed about as well as Sugar Moon but is growing back much faster.
I garden in Zone 6b CT but we had a Zone 4 winter!
All of the Buck Roses are grown in Iowa, with little or no protection. Which makes the "zone 7" designation suspect. I grow it here in zone 5 with no problems.
Do you cover your Iowa Belle to get it through the winter? I'm just about to order it because it looks so beautiful and my other Buck roses are all great (Zone 5). I did wonder about this one because it is categorized as a Tea instead of shrub rose. Thanks.
