black spot, like roses, real bad, but the main problem few leaves only a few flowers, and green fruit, they are in large pots, could it be the don't like pots?
My blackberry bush
What variety of blackberry?
What are the ingredients of your soil mix? What brands? Where did you get the ingredients?
How big is your container?
Do you have holes drilled not only on the bottom but up the sides?
Yes, that's not it, I have a small nursery, I use expert gardener, from Wal-Mart, there in 15 gallon pots, it's gotta be the PH or not enough nitrogen, or both.
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