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Douglas Fir

Pseudotsuga menziesii

GIS Coordinate:
N40 20.967 W94 52.856

Trail Number:
G18

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Description

Family:
Pinaceae

Foliage:
Needles 1-1.5 inches long, flat, and stick out straight from branches. Cones 3-4 inches long and have bracts extending beyond ends of scales

Native Locale:
Rocky Mountains and Pacific Coast (British Columbia to Mexico)

Mature Height:
40 to 80 feet

Mature Width:
12 to 20 feet

Hardiness Zones:
Zone (3b)4 to 6

Soil Preference:
Prefers neutral or slightly acid, well-drained, moist soils; fails on dry, poor soils; injured by high winds; enjoys abundant atmospheric moisture

Growth Habit:
Open, spired pyramid with straight stiff branches

Rate of Growth:
Medium, will grow 12' to 15' over 10 year period

Disease and Insect:
Cankers, leaf casts, leaf and twig blight, needle bright, "witches broom", aphids, Douglas fir bark beetle, scales, spruce budworm, pine butterfly, Zimmerman pine moth, gypsy moth, and strawberry root weevil

Landscape Value:
n/a

Additional Notes:

  • Used as Christmas trees and are important for lumber. The genus name refers to "false" because it was once assigned to the genus Abies. Common name in honor of David Douglas, who introduced the seed to Europe. Known to be one of the strongest woods.

Photos

Summer '08 - Douglas Fir