First season: Limit growth to the tops of the posts and remove any side shoots.
Subsequent seasons: The wires need to be extended to allow the vines to cover the horizontal framework of the pergola. Train out extension growths along the wires to establish a framework over pergola. Any excess extension growth needs to be removed back to the main framework.
Annual pruning: Once a mature framework has been established, vines should be pruned regularly during the summer to control excess growth and after fruiting to re-establish the main framework.
Summer pruning: Remove all unwanted extension growths (as above). Once lateral shoots have formed 2 sets of fruit, shorten any additional growth back to the last leaf above the 2nd bunch. Remove all lateral growths that have not set fruit back to the main stem. – This will need to be repeated at intervals during the summer.
Winter/Spring pruning: Once fruit has been harvested prune all lateral shoots back to 2-3 buds from the main stem.
Raspberry canes can be rather floppy and, if required, should be tied into the wires on the wall behind. After the canes have fruited they need to be removed at ground level.