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Native only to the Rocky Mountain states, the blue spruce (Picea pungens) is one of our most beautiful evergreens and has been planted widely throughout Iowa for ornamental use. It is a hardy tree with compact, dense foliage and a slow growth rate. Colorado Blue Spruce Tree - Photo by Paul Wray, Iowa State University Hardiness: Zones 3 through 7 Growth Rate: Slow to Moderate
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