I think most are only hardy to zone 8--there are a few slightly hardier cultivars that might be able to do the warmer parts of zone 7 but I suspect you're in 6? So I think it would be a pretty long shot unless you can bring them in for the winter. Places like Lowes & Home Depot don't seem to really pay attention to whether the things they sell are hardy in the areas they're selling them.
well that answers that then, Yes, I know Lowes will sell anything pretty, they don't care if it will live or not. I wish they had more variety that were hardy. Every year it is row after row of the same stuff they had the year before it seems like.