I have two thornless trailing vine blackberry bushes. One of them produced lots of berries while the other produced none. In the early summer after the one bush was finished producing I didn't know I was supposed to cut off the canes that had fruit on them. The vines grew very long over the summer despite the fact that I had a mold problem because of excess rain. There is only one main cane coming out of the ground so I'm not sure how to prune it. What branches do I cut or is it too late?
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These articles will help you with pruning and winterizing your Blackberry plants.