most places where I have looked to buy this plant say it is only hardy to zone 7, I am in zone 8, and I desperately want this in my yard as I loved to pick and eat the tart berries as a kid. (AK born and bread) I found one place where it listed from 3-8 instead of 2-7 but no link to buy. are there types that will survive the humidity and heat (at least better than I can) we get here in Fayetteville? if so where Can I get them?! Thanks a million.