Teresa, I've got 'Gladiator' on order... I tried one of the big ones years ago, and can't remember if it pooped out, or I moved.. I *think* it pooped out... It might have been when I was living in a warmer, relatively frost free-zone on the SF Bay.
I think they might be marginal here, but I'm willing to try again... They're listed as maximum zone 8. I'm 9b. Practicing zonal denial again (and again)...