I have a small cedar hedge (4 plants about 6 ft. high) that provide privacy. However, the inside branches seem to be dead or dying. I have pruned the hedge (from about 8 feet to 6 feet so sun can get inside) and have added mulch at the bottom. I have also pruned the sides. The outside is growing well and a little bit of greenery seems to be starting on the inside branches, but then turns brown. I do not see any insects. There is a lot of rain and the hedge has enough moisture. I don't know what to do next to help the inside branches to grow back. I have very little privacy now. Thank you for any help you can give me.