Douglas Fir
Pseudotsuga menziesii
ConiferAbout Douglas Fir
Douglas Fir is one of the most commercially important timber trees in North America and among the tallest tree species in the world. Despite its name, it is not a true fir. It is a key species in Pacific Northwest forests and is widely used for lumber, plywood, and Christmas trees.
Quick Facts
How to Identify Douglas Fir
- Flat, soft needles spirally arranged, giving branches a bottlebrush look
- Distinctive cones with three-pointed bracts resembling mouse tails
- Thick, corky, deeply furrowed bark on mature trees
- Conical crown that becomes more irregular with age
- Pointed, reddish-brown buds at branch tips
Care Guide
- Water regularly during the first few years of establishment
- Avoid heavy pruning; allow natural form to develop
- Best suited for large properties with ample space
- Watch for Douglas-fir tussock moth and Swiss needle cast
- Mulch young trees to maintain soil moisture
Known Issues (2)
Armillaria Root Rot
HIGHOne of the most widespread and destructive forest diseases in the world, caused by a complex of honey mushroom species. It attacks stressed trees through root contact and can persist in dead stumps for decades, infecting nearby healthy trees.
Affecting 36 regions
Cytospora Canker
HIGHA common fungal disease of spruce and other conifers that causes branch dieback, typically starting from the lowest branches and progressing upward. Colorado blue spruce and Norway spruce are especially susceptible. The fungus enters through wounds or stressed tissue. White resin bleeding on bark is a hallmark sign. Stressed trees are most vulnerable.
Affecting 25 regions