A man from texas sent me some "variegated hakone grass", last fall. It was too late here to reasonably put it outdoors, so I stuck it in the greenhouse and divided, divided it all winter. This spring I put it outside and it's gorgeous. It's more like a ribbon grass color, with white and just a hint of pink and green striped leaves. So far, it's grown to about knee high. Do you guys think this would survive in zone 5, or is this something I should dig up for winter?