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Colorado (Blue) Spruce


Height and Spread Colorado Spruce can grow 9 to 19 metres in height and may have a width of 4 to 7 metres.

Hardiness Zone 2

Preferred growing conditions Prefers full sun and moist, well-drained loams; it is the most drought-tolerant spruce species. It does not tolerate flooding or shade.

Form Colorado spruce grow in a pyramid-shape with dense, horizontal branches.

Flower/seeds Green to purple flowers (female) or orange flowers (male). Flowers turn into small, papery cones with brown, winged seeds.

Leaf Four-sided needles that may be silvery-blue to dull green in colour. The needles may be 1 to 2 cm in length.

Bark/wood Ash-grey bark looks like it is made up of scales or flakes.

Fruit Not applicable

Pruning Prune to keep shape and remove damaged limbs. Sterilize pruning saws and shears with methanol (gasoline anti-freeze) between cuts and between trees.

Problems (Disease/Insects)

Spruce needle miner, conifer wood borers, cooley spruce gall adelgid, sawfly, aphids.