Answer: I suspect the poor fruiting has to do with your pruning routine and possibly due to a lack of sun. This is a so-called everbearing or twice bearing variety but in reality home gardeners in colder regions such as yours do better with them by concentrating on the late season crop only. To do that, and simplify pruning, just cut it to the ground each year in late winter or early spring. You can cut it off or mow it off whichever is easier. (A mid July cutting would be too late in your short growing season.) Generally speaking, too, raspberries grow better in full sun all day long. I hope they are getting at least six hours of good direct sun. Also you may want to review your general care, here is a good information sheet you may find helpful with that.
I hope this helps!
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