Douglas Fir — Growing reference
| Scientific name | Pseudotsuga menziesii |
|---|---|
| Seed germination (days) | 20–40 |
| Soil temperature for germination (°C) | 12.8–20 |
| First harvest or flowering (days) | 1460–3650 |
| Measured from | Transplant |
| Plant spacing (cm) | 609.6–1219.2 |
| Mature height (cm) | 1524–2743.2 |
| Mature spread (cm) | 609.6–914.4 |
| USDA hardiness zones | 4–6 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Transplant |
Growing directions
Plant balled-and-burlapped or container-grown trees in spring or fall in deep, well-drained, slightly acidic soil in full sun, allowing generous room to grow since this is one of the largest conifers in North America. Douglas fir carries soft, flat, blue-green to dark green needles and distinctive pendulous cones with three-pointed bracts that protrude past each scale, a reliable identification feature unique among conifers. It is among the most important timber trees on the continent and is also the most widely grown Christmas tree species in cooler climates, valued in the landscape for dense pyramidal form and a strong central leader. Performance declines sharply outside cool, humid, well-drained mountain and coastal climates, so it is a poor choice for the hot, humid Southeast or dry, alkaline plains soils.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0