Hi.. I had some of this Bunny Tail grass last summer.. but I killed it. :( I think I over watered it. Anyway, the nursery where I got it called it a tender perennial. I have never heard that term.. but that is what she said.. she said I should bring it in in the winter.. or I could try to mulch it REALLY heavily and it might be ok.. but I never made it that far.. so bleh. lol I might try some more this year.
I am in Ohio, so I am sure you would probably have to be pretty careful with yours too.. BUT if other places in your area are using it to landscape with.. then maybe it is a little tougher than this girl thought. ;) Good luck!