Blue Spruce (Colorado)
Blue Spruce (Colorado) Coniferous
Because of its cold hardiness, form, and blue-hued foliage, blue spruce is widely planted in ornamental and general landscape settings. It is also used considerably for Christmas trees.
Where To Grow
Trees growing to 50 meters tall, the crown long-conic; branches whorled, ascending to slightly to strongly drooping; twigs not pendent, stout, yellow-brown, usually without hair; many small twigs produced on the main trunk and between the main whorls of branches; bark relatively thick, gray-brown, breaking into furrows and rounded ridges, only slightly scaly. Needles are evergreen, borne singly and at right angles from all sides of the twig, 1.6-3 cm long, 4- angled, stiff and sharply spine-tipped, silvery to bluegreen. Seed cones are green or violet, ripening pale buff, (5) 6-11 (12) cm long, ellipsoid, pendent, the scales elliptic to diamond-shaped, widest below middle, stiff at the base, the tip flexible, unevenly toothed, and extending 8-10 mm beyond seed-wing impression. The common name is based upon the blue foliage color of some races.
Blue spruce is a slow-growing tree and some individuals have been reported to live for more than 600 years.