Answer: Spruce's tend to lose the needles in the middle of the plant as they grow older. Sometimes spider mites or other insects can speed this process up. About the only way to hide the centers is to prune carefully each spring (just as new growth is emerging) to encourage thicker outer growth. You might try hosing off the centers of your evergreens every month or so during the growing season to discourage insect pests. Same advice for the two plants near your house. Lightly prune them back and they should develop new foliage. Good luck with your landscape.
Q&A Library Searching Tips