The Mature Size of a Black Hills Spruce

Appearance

• Black Hills spruce has a pyramidal-shaped habit, growing fatter at the base. At a height of about 25 feet, the tree has a width of about 10 to 12 feet. Compared to white spruce, Black Hills spruce has a denser habit, shorter cones and more brightly colored bluish green or green evergreen needles. The tree does not flower. Black Hills spruce is considered a superior ornamental tree when compared to the species by those in the horticulture industry, according to the Missouri Botanical Garden.

Uses

• Black Hills spruce may be grown as a single specimen or planted in pairs to frame a path or entryway. The tree is tough enough to withstand strong winds and can be planted in a line to act as a windbreak. The tree can also be used for a naturalizing effect in areas with limited space. Its dense foliage makes it suitable as a privacy screen. If growing multiple trees, provide at least 15 feet of space between trees to avoid overcrowding.

Culture

• Adaptable and rugged, Black Hills spruce is tolerant of a wide range of growing conditions as long as soil is well draining, though it prefers a moist loamy soil. The tree will grow in soil with a pH range from 4.0 to 7.5 according to North Dakota State University. Black Hills spruce is hardy in U.S. Department of Agriculture plant hardiness zones 2 to 8. While it prefers full sunlight, the tree will tolerate partial sunlight and even light shade.

Considerations

• Black Hills spruce is considered more adaptable than white spruce, though like other spruce species the tree is susceptible to many pests and diseases, which can limit the tree's potential for growth. Regular irrigation is especially important, as water-stressed trees attract spruce spider mites. If your tree is infested with spider mites, spray the tree with a direct stream of water to dislodge colonies. Avoid using broad-spectrum insecticides, which kill off beneficial predators.