Hi, I planted 30 green emerald arbors in spring 2014. They were watered adequately and looked great until now. The arbors are in an open area so they did get a lot of wind over the winter season. Now that it is spring, I have noticed some brown at the bottom and middle outer areas of the arbors (more so at the bottom outer) Some of the arbors have more brown than others. There is also a small amount of black foliage on some of the arbors too. Should I cut off the brown and black areas? Should we fertilize with evergreen sticks? Just want to be proactive and see if we can help them along. Thanks for any advice.