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Blue Colorado spruce
Picea pungens var. glauca
Blue Colorado spruce
It differs from the main species in bluish-green needles that retain color throughout the year. The life expectancy of needles, depending on the conditions, is 3-10 years. Plant height is 20 m. Annual growth is more than 30 cm. The crown is symmetrical, cone-shaped. Shoots reach the ground, arranged in tiers almost horizontally. It has been cultivated in Europe since the middle of the 19th century.
Propagated by seeds and cuttings. When sowing seeds, about half of the seedlings inherit the blue color of the needles. The rooting rate of winter cuttings taken from 10-year-old plants is 53%. Resistant in urban conditions to smoke, soot, dust, wind. Branches do not break under the weight of wet snow. Winter-hardy and drought-resistant. Suitable for creating large arrays, small curtains, for single plantings and alleys. Tree, aged 50, height 19.3 m, trunk diameter 30/38 cm.
It differs from the main species in bluish-green needles that retain color throughout the year. The life expectancy of needles, depending on the conditions, is 3-10 years. Plant height is 20 m. Annual growth is more than 30 cm. The crown is symmetrical, cone-shaped. Shoots reach the ground, arranged in tiers almost horizontally. It has been cultivated in Europe since the middle of the 19th century.
Propagated by seeds and cuttings. When sowing seeds, about half of the seedlings inherit the blue color of the needles. The rooting rate of winter cuttings taken from 10-year-old plants is 53%. Resistant in urban conditions to smoke, soot, dust, wind. Branches do not break under the weight of wet snow. Winter-hardy and drought-resistant. Suitable for creating large arrays, small curtains, for single plantings and alleys. Tree, aged 50, height 19.3 m, trunk diameter 30/38 cm.
Eng.: Blue Colorado spruce. Suom.: Hopeakuusi. Sven.: Blågran.
