Not strawberry, but I've grown Gruss an Teplitz since 1997 in my zone 5b, approximately, because I'm in Sweden and climates cannot really be compared. I don't do winter protection, haven't done it for the last 10 years. Snow cover works for my roses most winters but not the last when we had a March with freeze-thaw cycles and too much sun. Still, Gruss an Teplitz survived but will probably not flower this summer. It's one of my favourites.

Thank you, Mariannese for answering sunny's question. I take hardiness with a grain of salt, it's how vigorous that particular own-root is, and how suitable that own-root is for your soil.

Liv Tyler is hardy to zone 6b, but it died on Andrea in Cambridge, England, zone 8. It also died on another person in my Chicagoland. However, Liv Tyler loves my alkaline clay and the root became big, I didn't protect it over the winter, but it's green to the tip, with 40+ buds now.

Margit Schowalter from Alberta, Canada, zone 4b, posted this in HMF:

""GRUSS AN TEPLITZ - Hardiest Hybrid Tea Rose, continuous bloomer, dark red double. Plant deep, 1 foot, and you will have it for years. Each $1.50. Best of all in my opinion for the district. Boughen Nurseries Catalogue, Valley River, Manitoba, Canada 1950.

[note: Valley River is in Canadian Zone 2]