evergreen tree
Douglas-fir: pruning, storm risk and removal
Pseudotsuga menziesii. Also called Douglas fir, Oregon pine, Doug fir.
Plain-English notes for homeowners, plus field notes for tree crews. General guidance only: for one specific tree, have a local insured pro look at it.
Douglas-fir at a glance
| Height | 40-80 ft in yards; 100-250 ft in old forests |
|---|---|
| Spread | 15-25 ft |
| Growth rate | Medium |
| USDA zones | 4-6 |
| Lifespan | Typically 500-1,000 years in old forests; yard trees often live many decades |
| Type | Evergreen |
| Native range | Western North America, from the Pacific coast through the Cascades, Sierra Nevada and the Rocky Mountains |
| Roots | Deep and wide on good soil, but roots can be shallow where the soil is thin, wet or compacted. |
| Wood | Strong and straight-grained for its weight. It is one of the most widely used lumber species in North America, and it burns well as firewood when dry. |
| Storm risk | mediumTall trees with heavy crowns can fail in strong wind, especially after root loss, soil saturation or construction work nearby. Healthy trees on deep soil usually hold up well. |
Typical ranges, not guarantees. Soil, water, space and care change how a tree grows. Storm risk is our general rating for the species, not an inspection.
For homeowners
Caring for a douglas-fir
Best time to prune
Late winter or early spring while the tree is dormant. Remove dead or crossing limbs and keep a single strong leader.
Avoid pruning
Avoid topping or removing the leader, and avoid heavy cuts into bare wood. Do not take off more than about a quarter of the live crown at one time.
More on timing: when to prune trees.
- Give it room. A Douglas-fir needs space for its roots and its crown, so plant it well away from buildings and power lines.
- Water young trees deeply during dry summers for the first few years.
- Keep heavy equipment and fill soil off the root zone.
- If you see mushrooms or shelf-like growths at the base, have a qualified arborist look at the tree.
Safety first
Do not climb a tree or use a chainsaw on storm-loaded or broken wood. If a tree or limb is touching power lines, stay away and call the utility. If someone is in danger, call 911. For anything big, hire a local insured pro: read how to hire a tree service and is my tree dangerous?
Lirevon does not do tree work. Find local pros on Google Maps and read their reviews, then get two or three written quotes.
For tree crews
Field notes: working on douglas-fir
- 1Large trees can have root rot or butt rot that does not show in the crown. Sound the base and check the root flare before you commit to a climb.
- 2Long branches on lower limbs carry a lot of weight. Plan rigging points and rope strength with that in mind.
- 3Pitch and sap are heavy on this species. Expect gum on saws, ropes and gloves.
- 4In dry regions, trees stressed by drought may carry dead tops. Treat them as brittle.
Removal notes
Mature Douglas-firs can be very tall with heavy, wide-spreading limbs lower down. Many removals need a crane or careful top-down sectioning. Check the base for conks, hollow sections and root rot, and look for power lines in the fall zone.
Wood
Strong and straight-grained for its weight. It is one of the most widely used lumber species in North America, and it burns well as firewood when dry.
Pricing this job? Try the tree job estimator. Follow your own safety plan and crew training on every job.
Common problems for douglas-fir
Pests and diseases to watch for. Each link explains signs and what to do.
Trees often mistaken for it
Check the leaves, bark and shape before you decide how to prune or treat.
Where douglas-fir grows
Native range: Western North America, from the Pacific coast through the Cascades, Sierra Nevada and the Rocky Mountains
Common in these US regions. Tap one to see other trees there.
Free tools for this tree
They run in your browser and nothing is sent anywhere. Results are estimates.
Douglas-fir: common questions
Is a Douglas-fir a true fir?
No. It is in its own genus, Pseudotsuga, which means 'false hemlock'. You can tell it by the small three-pronged bracts that stick out of the cone scales.
How tall will a Douglas-fir grow in my yard?
Typically 40-80 feet in a yard setting, but it can grow far taller in a forest. It is a big tree, so check the space overhead and around it before planting.
Why are the needles on my Douglas-fir turning brown?
Common causes are drought, root disease, needle cast disease, or damage from cold or wind. Check the soil moisture first, then ask a local arborist or extension office.
Is Douglas-fir good firewood?
It is decent. It burns hot enough for most stoves when well seasoned, but it is lighter than hardwoods like oak, so it burns faster. It also has pitch, so burn only dry wood.
Can I prune the top of a Douglas-fir to make it shorter?
It is not a good idea. Topping ruins the shape, opens the tree to decay and can lead to weak new growth. If the tree is too tall for the site, removal may be a better choice.
Do Douglas-firs grow well in the Midwest or South?
They are not a great fit for hot, humid regions. Some Rocky Mountain types do fine in cold, drier areas. Check with your local extension office before planting.
More trees in the same regions
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