Colorado Spruce, Colorado Blue Spruce
Form and Growth Characteristics: Plant Type - TreeGrowth Rate - Slow to moderate growth rate 30-50' after 35-50 years.Mature Height - 30-60' in landscape, 90-135' in wildMature Width - 10-20' in landscape, 20-30' in wildLongevity - Lives to 400 years
Ornamental Characteristics: Flower - Monoecious, staminate orange, pistillate greenish or purple.Fruit - Cylindrical but slightly narrowed at each end, 2-4" long, 1-1.25" wide, green with violet bloom, pale shining brown when mature, scales wavy, oval, blunt and jaggedly toothed at apex, short stalkLeaf - Young foliage soft and silvery blue-gray as it emerges. Final color varies on individuals from gray-green to blue-green to silver-green.Fall Color - Bark - Other Features - Very stiff and formal in outline. Some natural varients have a degree of bluish foliage. The blue trait is variable, most blue-leaved cultivars are asexually propagated.Possible Use - Used in large scale landscape plantings. Some forms can be used for hedges, screens, or windbreaksSeason Of Interest -
Culture and Care: Care Requirements - Prefers rich, moist soil in full sunlight although is more drought tolerant than other Picea; very adaptable. Seed requires no pretreatment, though most of the cultivars are grafted onto seedling understocks. Zones 3-8Native Habitat - Native to Southwestern United States; Rocky Mountains from Colorado to Utah to New Mexico and Wyoming. Introduced about 1862.Diseases and Insects - Subject to spruce gall aphid, Adelges cooleyi, which causes tips of branches to die, spruce budworm and spider mite, Cytospora canker may infect lower branches, Phomopsis occulta caused branch dieback in Michigan nurseries.Strength - acceptable in dry climatesWeakness - Overused; popular as a specimen but hard to combine well with other plants; the use of this plant or a blue-foliage type in the front yard may detract from the rest of the landscape.Plants of this taxon:
Find Related Plants:- Other plants with the common name Spruce.- Other plants of the family Pinaceae.- Other plants of the genus Picea.- Other plants of the species Picea pungens.