>In both cases, native blackberrys, you can train them any way you want, >thorns >will detur the dogs, grow very fast and they produce wonderfull fruit. >
Blackberries, AFAIK, are not native to the American continent. Himalayan
blackberries, the most commonly seen blackberries growing wild in the west,
were introduced by European settlers. They are indeed very easy to grow. In
fact, they are a major pest plant where I live. (northern CA)