Evergreen trees do not drop their foliage or needles during the fall, although they do shed over a period of time. Although there are evergreen spruce trees, such as the globe-shaped, spreading or low-spreading varieties, others are tall and slender. Some of the tall, thin evergreen trees are shaped as cones or pyramids. Always choose an evergreen tree with a shape or size suited for your yard.
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The black spruce (Picea mariana) has an irregular, open conical crown with either dropping or short horizontal branches. It can grow up to 60 feet tall with a trunk diameter of 4 to 12 inches, according to the Alaska Denali Tours website. Black spruces have stiff, sharply pointed, 4-angled needles that are ashy blue-green, containing white lines. Its brown, hairy twigs are slender and rough. This evergreen tree has long grey cones that are egg-shaped or rounded. Usually the cones are located in clusters near the top of the tree's crown. Their finely toothed cones are brittle and the brown seeds are arranged in pairs.
The Serbian spruce (Picea omorika), an elegant evergreen tree, has a thick trunk and short branches. It has glossy, dark green needles that grow ½ to 1 inch long. According to Ohio State University, the Serbian spruce grows from 50 to 60 feet tall. Its short branches ascend on the tree's upper portion, but droop on its lower portion, which forms a slender pyramid silhouette that's roughly a quarter as wide as the tree is tall. Serbian spruces don't need to be pruned to maintain their slender, pyramidal shape. Although the top surface of the needles is dark green and glossy, the tree's lower surface has two white lines. This evergreen is used for screening, as a specimen tree or on highway medians.
Skylands Oriental Spruce
The Skylands oriental spruce (Picea orientalis) grows from 50 to 100 feet tall. The average tree grows about 60 feet high after 60 years, according to the Backyard Gardener website. This tall evergreen has pendulous branches and a narrow, columnar growing habit. Its dark green needles are glossy with white lines on the sides. The evergreen's cones are 2 to 4 feet long and are reddish-purple when young, although they turn brown with maturity. It can grow in gravelly, poor soil, although it needs to be protected from harsh winds. In exceptionally cold weather this spruce can develop brown tip burn. It has gold, creamy foliage that's able to maintain its colour throughout the year.
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