Blue spruce is an evergreen tree that can reach heights of 46 metres. Color of needles from glaucous to bright blue, and length of needles is up to 3 cm. This tree is often used as a decoration plant and as a Christmas tree. A decoction from young cones of a blue spruce and also its needles are used in traditional medicine against viral infections and catarrhal diseases. Essential oils of a blue spruce calm nervous system.