Germination: Sow 1/4" Deep, Keep moist, (Not wet). Stratify Cold for 30 days, 40 Degrees F in a Moist Medium (Not wet). Sowing Pseudotsuga menziesii glauca Seeds:įor best results, please follow the instructions in the order provided. ![]() Plant in groups or use as screen/windbreak. Even during heavy seed-crop years, only about 25 of trees in closed stands produce an appreciable number of cones. Seed production is irregular over a 57 year period, stands usually produce one heavy crop, a few light or medium crops, and one crop failure. Attractive specimen, good accent plant, Christmas tree, shade tree, lawn tree. Seedings of Douglas Fir grow rapidly, and can reach heights of over 200 feet during a lifespan which can surpass 1,000 years. Appreciable seed production begins at 2030 years in open-grown coast Douglas fir. Under ideal conditions, Douglas Fir can grow 35 feet tall in 20 or 25 years. It has been planted in New Zealand as a timber crop and is now considered an invasive weed there. Douglas Fir is a widely grown and very popular ornamental in Great Britain. ![]() It often grows in pure to nearly pure stands. A good tree for northern climates.Ĭulture: One of the most abundant trees in western North America, Douglas Firs grow from sea level to 10,000 feet and in climates that get just 15 inches of precipitation annually to climates that average more than 100 inches of precipitation a year. Does best in locations with abundant air and soil moisture. Site Requirements/ Soil Tolerances : Best grown in medium to wet, well-drained soils in full sun, it can tolerate partial shade, but it does best in full sun. Other Names: Douglas-fir, Douglas Spruce, Green Needled Douglas Fir, Pseudotsuga douglasii, Pseudotsuga menziesii, Pseudotsuga taxifolia Viridisĭrought Tolerance: In cultivation, Douglas Fir is not tolerant of drought. Douglas Firs start bearing cones at the tender age of 10 years and continue to produce nearly every year of their lives. These trident shaped bracts are unique to the Douglas Firs. The cones are oval and pendulous, 2 to 4 inches long and each scale has a conspicuous three-pointed bract that gives the cone an overall spiny look. The grayish green needles are flattened, quite soft, about 1 inch long, and arranged all around the twigs like a bottle brush. The bark on young trees is smooth and ashy gray that on mature trees is reddish brown and broken into longitudinal plates really large trees can have bark more than 12 inches thick. Douglas Fir has a narrow pyramidal shape, losing their lower branching and becoming more cylindrical with age. Some of the larger trees are believed to be over a thousand years old. Specimens more than 300 feet tall with trunk diameters exceeding 15 feet are known. Green Douglas Fir, Pseudotsuga Menziesii Viridis, Tree Seedsĭouglas Fir is a huge and stately long-lived evergreen conifer, the largest member of the pine family.
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