How are your summer/winter temps? Here it gets hot in the summer and rarely gets below freezing in the winter.
Pomegranate trees are very hardy; I have never watered or fertilized mine and they still produce fruit.
I live on the family ranch, and these pomergranate trees have been here ever since I can remember.
I have seen the small starter pomergranate trees at plant nurseries from time to time.
I have pomergranate trees, and my chickens free range underneath them. They eat the pomergranates that fall to the ground all the time. They love them, and I love it because it makes the feed bill smaller.