When should blueberries be pruned? Should I reduce the height of really long bull canes that grew this year?
Lane County Oregon
The long bull canes as you called them are in fact a good thing, your shrubs are healthy.
No do not prune them shorter if you want a full crop of berries. Pruning should be done during the dormant period say February.
Here is more information https://catalog.extension.oregonstate.edu/ec1304