Pseudotsuga menziesii
Douglas Fir
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Douglas Fir (Pseudotsuga menziesii) - Description
Douglas fir (scientific name Pseudotsuga menziesii), also known as Oregon pine or Douglas spruce, is an evergreen conifer species native to western North America. The common name is misleading since it is not a true fir, i. e. , not a member of the genus Abies. For this reason the name is often written as Douglas-fir (a name also used for the genus Pseudotsuga as a whole).
Douglas Fir (Pseudotsuga menziesii) - Growth
Evergreen, fir like trees with pendulous cones with conspicuous protruding bracts and pointed, many-scaled buds. To 80 feet tall. Pseudotsuga grows best in full sun. Large specimen trees.
Douglas Fir (Pseudotsuga menziesii) - Planting
Propagate from seed. Sow in spring in containers outside.
Douglas Fir (Pseudotsuga menziesii) - Pest
Do not plant within 200 feet of Picea pungens (Colorado spruce) as they are alternate hosts for Cooley spruce gall aphids. Lesion nematode, aphids, scale insects, bark beetle, budworms, caterpillars, and weevils can cause problems. Pseudotsuga is also prone to dieback, butt rot, canker, needle cast, and brown felt blight.
Douglas Fir (Pseudotsuga menziesii) - Interesting facts
Pseudotsuga is native to the forests of China, Taiwan, Japan, Western North America, and Mexico. They are often used as Christmas trees because they tend not to shed their needles as much as others.
Douglas Fir (Pseudotsuga menziesii) - Soil and irrigation
Well drained, deep, acidic to neutral soil. Blue types tolerate slightly alkaline soil.
