I know that I am replying to this thread 6 yrs later, but I'm so interested in all your comments in regards to blackberries. Presently I have Navaho. In which I have planted in the RGGS kiddie pool, it does fantastic, love the sweetness too. I tried to grow Ebony, [Jacyln, Jewel, Ann, and Brandywine-raspberries] in the ground. All did poorly and I ripped em out. Now I have a Black Satin in the pool this year. But reading that they are tart to bitter.
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I was thinking of the Arapahoe or Prime as sweet.. with all the varieties posted here.. I'm lost.
I would prefer thornless, and sweet. Those are most most important factors. If upright great. If disease resistant, greater..
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please help advise.