blue back in Blue Spruce
Well you can't add chemicals to the soil to change a spruce's color. You can only do that with hydrangeas. Color in spruces tends to fade as the plants mature, although the amount of color the tree loses depends entirely on what variety of blue spruce you have. Some of the newer hybrids remain quite blue through their lifetimes, but most of the older ones retain a light blue cast, but are never are as blue as they were when they were younger."
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