Answer: Black raspberries are summer bearing types and should be pruned immediately after you've harvested the berries. Completely cut out any canes that produced berries. They will not develop new berries so cut them down to ground level. You can prune again in the spring, just as new growth begins. At this time (usually late March or early April) remove all weak canes, but leave the thickest, most robust canes alone. You can also cut back any tall canes (those over 5 feet) to 4.5 to 5 feet. After harvesting the berries, cut these canes down to ground level. I hope this clarifies things for you.
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