Some of my canes are 10 feet long or tall. Do I need to cut them back, and if so, how tall should I leave them? They are tied to trellises, but I have trained them to the wires.
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm