Dirtmechanic
Garden Addicted
We have 3 rows but since they are along a fence sideways to the sun I once trimmed a high, medium, low height to see if the increased sunlight could help in some way. Mind you they were doing well already. I cannot say that they are any different really, at least not much, but they do seem to have more branching at the trim cuts from years ago.I only trim dead wood on mine. I pinch the tips after they finish fruiting. They're high bush so I want them as big and bushy as possible.