Thanks Mary. I'm wishing now we had built on our 3 acres behind Luke so I could plant it all in blackberries. LOL. They need a lot of room, and since you have it, go for it. We bought 3 plants 2 years ago at the Rare Fruit sale. (A the Spring sale I think.) Last year we got a few berries. But this year they have gone gangbusters. Mine get morning and high noon sun, but are backed up to our west fence so get no afternoon sun. A friend from the old Valley of the Sun Men's Garden Club lived on a big lot on 7th Street and he had a huge blackberry patch in his back yard with the same exposure.
I was disappointed with the rare fruit sale last month. The only extra vendor there was the herb society. Maybe the fall sale will be better.