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Picea pungens "Glauca" - Blue Spruce / Silver Spruce
Picea pungens "Glauca" - Blue Spruce / Silver Spruce
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€19,90 EUR
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Height of the seedling 2 0-70cm a
Frost resistance -30°C Target height 8-10 meters
The crown is evenly conical, pale and silvery, with very stiff and stinging silver-blue needles.
Height: 8-10m.
Width: 4m
The spruce grows naturally in North America in the southern Rocky Mountains at an altitude of 1,800–3,400 meters. Its habitats are bright mountain forests, and it thrives well on dry soils as well. In many places, the needles show a strong blue-gray wax coating characteristic of conifers in the southern mountain regions. The color of the needles varies from green to gray-green and bluish. In Finland, the October fir becomes stunted when planted in the shade due to lack of light, but in open places it keeps its needles excellently and often develops a blue-gray shade. The blue-grey color form known as silver fir (f. glauca) is one of the most used decorative conifers in southern and central Finland. Zones I - VI (Source of information: Arboretum Mustila)
The silver fir's growth rate is slow or average. In Finland, at its best, it becomes approx. 5–12 meters high, 2–3 meters wide, conical, with rather narrow branches. Silver fir and okra in general are characterized by densely growing almost horizontally thick branches covered with needles and clearly distinct layers of branches. The waxy, 1.5-3 cm long needles are sharp-tipped, which is what the scientific name also refers to.
The silver fir grows quite young. Silver fir is monoecious. The tree blooms in spring with reddish-yellow stamens and pink pistils. The slightly cylindrical seed-containing cones that develop from the pollinated queen cones are 6-10 cm long. They are initially green and gradually turn light brown as they ripen in September-October.
The silver fir needs a sunny or semi-shady place to grow, as it does not thrive in the shade. The silver fir has a deeper root system than the Norway spruce and therefore it tolerates heat and some dryness better and is also more resistant to storms. However, the tree thrives best in fresh soil and nutrient-rich soil, and it requires a slightly higher ph value than the forest fir.
