Growth Rate
Moderate to Fast: Douglas Fir typically grows at a rate of 1 to 2 feet per year under optimal conditions. In some cases, it can grow faster, especially in its early years.
Size
Mature Height: It can reach heights of 40 to 80 feet or more in ideal conditions.
Mature Spread: Its spread at maturity ranges from 12 to 20 feet.
Growing Conditions
Sunlight: Prefers full sun to partial shade.
Soil: Thrives in well-drained, moist, acidic soils, but can tolerate a range of soil types.
Watering: Requires regular watering, especially during dry spells, but is generally drought-tolerant once established.
Hardiness Zones: Suitable for USDA hardiness zones 4-6, depending on the variety.