Citrus definitely doesn't like freezes and in fact until about 5-10 years ago I only saw citrus trees far south from me in the Rio Grande Valley of Texas were there are citrus groves as far as the eye can see. I think we didn't have freezes here in my area for several years so people began planting them not knowing that if we have one of those years, they would all die in my area.
So thanks about the Pomegranate info, now I'm definitely going to buy the first one I see.