Q: I planted eight blue spruce trees a year ago. This spring, I have noticed that two of the trees have a yellowish hue. They do not feel brittle, but they do not have the rich green and blue of my ...

Blue spruce (Picea pungens f. glauca), also called Colorado blue spruce, is a beautiful tree with blue-gray needles. Being colorful and relatively drought tolerant, it’s a favorite of many homeowners ...