I am new to using forums. I am hoping to have someone help me with forming a very large hedge row with Norway Spruce trees. We have a big deer problem and were told that this trees would hold up better. Currently there are 9 trees, 6-7 ft. tall and are spaced 3-4 ft apart from the widest limbs. Our long term goal is,.. about 15ft tall, 6-8 ft in depth and in a box like shape. Would love educated advice on how, when, and where to prune them :) Thanks for reading my post and helping if possible.