Trimming hedges to often results in a weaker bush with a thin green shell and hollow center with no inner leaves. If You can pull back some branches and see no inner leaves you have a problem. To fix this, and get better growth inside the center, learn how to thin out the right branches. This will cause the bush to make new branches inside. Its a good habit to start if you want to give some vigor to your bushes. Otherwise they are on their way out and will have to be replaced soon.
89 Chevy Silverado 1500 4x4