The Limb That Falls in November Was Already Dead in September
Tree pruning Portland, Oregon homeowners put off in September is what I end up pulling off a roof in November.
Every year I get those calls the morning after the first real wind event. A limb is on the fence, a limb is on the roof, or a shrub has split down the middle and is lying across the walkway.
Here is what I have learned doing this through a decade of Portland winters: most of what comes down was already dead or already weak before the wind arrived. The storm did not cause the failure. It found it.
That is the whole case for fall pruning. This article covers what to cut on shrubs and small trees before the rains settle in, what to leave alone until late winter, what tree pruning Portland, Oregon properties need actually costs, and where the line sits between work a landscaper should do and work that belongs to a certified arborist.
I will be clear about that line up front, because it matters for your safety and your wallet. We prune shrubs and small ornamental trees. Anything large, anything requiring climbing or a lift, and anything near a power line is arborist work, and I will tell y
What Tree Pruning Portland, Oregon Homeowners Pay
Pricing in this market usually works one of two ways.
By the hour, a two person crew runs $120 to $200 per hour, with most shrub and small tree work taking two to five hours.
By the job, rough ranges look like this:
- Shrub pruning, a handful of shrubs: $150 to $400
- Shrub pruning, a full property of overgrown hedges and foundation plantings: $400 to $1,200
- Small ornamental tree, under about 15 feet: $150 to $400 per tree
- Fruit tree, dormant season structural pruning: $150 to $350 per tree
- Overgrown laurel or similar, cut back hard: $300 to $800
Debris haul away is usually included in our pricing but is not universal, so ask. A single overgrown laurel produces a startling amount of material.
Large tree work, meaning anything over roughly 25 feet or requiring climbing, typically runs $400 to $2,000 or more per tree through a tree service. That is not our work, and the pricing reflects different equipment, different insurance and different certification.
These are typical ranges for the Portland market, not a quote. Tree count, size, access and how long it has been since the last pruning all move the number.
What to Prune in Fall and What to Leave Alone
This is where most well intentioned homeowners do damage. Pruning at the wrong time for the species costs you a season of flowers or invites disease.
Safe to prune in fall:
- Dead, damaged or diseased wood on anything. This is always in season, on every plant, in every month.
- Laurel, boxwood and other evergreen hedges. Light shaping only, nothing hard.
- Summer flowering shrubs that bloom on new wood, like hydrangea paniculata, spirea and butterfly bush.
- Anything physically dangerous. A limb over the driveway does not wait for the right season.
Leave until late winter, meaning February or early March:
- Fruit trees. Structural pruning belongs in the dormant season. Fall cuts in our wet climate invite disease into open wounds.
- Japanese maples. Prune in late winter when the structure is visible and sap is not running.
- Most deciduous shade trees. Dormant pruning is cleaner and easier to read.
Do not prune in fall at all:
- Spring flowering shrubs such as rhododendron, azalea, lilac, forsythia and camellia. They set next spring's buds in summer. Cut them now and you remove the flowers.
- Big leaf hydrangea, the blue and pink mophead type. Same reason. This is the single most common pruning mistake I see in Portland yards.
Why Timing Matters Before the Rains
There are two separate reasons fall pruning matters here, and they work on different timescales.
The short term reason is wind load. Portland soil saturates by November. A tree that was firmly anchored in September is standing in soft ground by December. Add a canopy full of dead wood and wet foliage catching a 50 mile per hour gust, and you have the failure.
The long term reason is disease. Our wet season is long, and open pruning wounds in a wet climate stay wet. For many species, cuts made in early fall seal poorly and become entry points. That is why fruit trees go in the dormant window, when fungal and bacterial activity is low.
So the fall work is defensive: take out what will fail, reduce what will catch wind, and leave the shaping for later.
Spotting a Limb That Will Come Down
You can do this from the ground in ten minutes. Walk around every tree on the property and look up.
- Dead limbs. No leaves in summer, bark peeling, snaps rather than bends. These come down first in any wind.
- Hanging limbs. A branch that broke but is caught in the canopy. This is the most dangerous thing on this list because it has no attachment left and falls on its own schedule.
- Included bark. Where two trunks meet in a tight V and the bark is pinched between them rather than forming a raised ridge. These splits fail suddenly and take half the tree with them.
- Cracks or seams in a trunk or major limb.
- Fresh lean. A tree that is leaning more than it was, especially with cracked or heaved soil on the opposite side of the base. This one is urgent and it is an arborist call, not a pruning call.
- Mushrooms or conks at the base. A sign of internal decay you cannot see.
- Anything resting on the roof, the fence, or a structure.
If you find a hanging limb or a fresh lean, do not wait for a scheduled visit. Those are the two that cause property damage and injuries.
Pruning vs Removal
Removal is sometimes the right answer and sometimes an overreaction. Here is how I think about it.
Pruning is the answer when the tree is structurally sound and the problem is specific: dead wood, a limb over the roof, a canopy that has gotten too dense, a shrub that has outgrown its spot.
Removal is the answer when the trunk has significant decay, when the lean is active and the root plate is lifting, when the tree is a species that is simply wrong for the location, or when it is invasive. English ivy climbing a tree, for example, should always come off, and in Oregon it is classified as a noxious weed for good reason.
Cost comparison: pruning a small tree runs $150 to $400. Removing that same tree runs $400 to $1,200, and stump grinding is usually another $100 to $300 on top. For large trees both numbers climb considerably.
A point worth making: removing a mature tree changes the yard permanently. More light, different drainage, and sometimes a soil stability issue on a slope where those roots were doing structural work. If the tree sits on a slope, read our guide to hillside landscaping in Portland before deciding.
When You Need a Certified Arborist
I want to be direct about this because it is a real safety issue and because plenty of companies are not.
What we do: shrubs, hedges, foundation plantings, and small ornamental trees we can work from the ground or a short ladder. Dead wood removal within reach. Clearing growth off structures, fences and walkways.
What belongs to a certified arborist or a licensed tree service:
- Any tree requiring climbing, ropes or a lift
- Anything over roughly 25 feet
- Anything within 10 feet of a power line. This is not a judgment call. In Oregon, work near energized lines requires specific qualification, and people are killed doing it otherwise.
- Trees with structural defects, decay or an active lean
- Removals of any significant size
- Anything requiring a formal tree risk assessment
Why it matters to you beyond safety: insurance. If an uninsured or unqualified crew drops a limb on your house, your neighbor's car, or themselves, that becomes your problem. Ask for proof of liability insurance and current workers compensation coverage. Verify the Oregon CCB license for any contractor, and for tree work specifically look for ISA certification.
Any contractor who tells you they can take down your 60 foot fir is either properly equipped and certified, or is about to make your problem much larger. Ask which.
What Not to Do
Topping
Cutting a tree's main leaders back to stubs to reduce height. It is the worst thing you can do to a tree. It triggers a flush of weak, fast growing shoots attached only at the surface, which are far more likely to fail in wind than what you removed. It also opens large wounds that never seal properly. Any company that offers to top your tree should be crossed off the list.
Removing more than about a quarter of the canopy in one season
The tree needs its leaves. Hard reduction stresses it into producing weak growth.
Flush cuts
Cutting tight against the trunk removes the branch collar, which is the tissue that seals the wound. Cut just outside the collar and let the tree do the rest.
Wound sealer and pruning paint
It does not help and can trap moisture. Research moved past this decades ago but the products are still on shelves.
Leaving stubs
A branch cut partway leaves a dead stub that decays back into the trunk.
Pruning in the rain
Hard to avoid some of the time here, but wet conditions spread fungal and bacterial disease between cuts. On a dry stretch, clean your tools between trees.
Portland Tree Rules and Permits
Portland regulates trees more than most cities, and it catches people off guard.
In general terms, street trees, meaning trees in the planting strip between the sidewalk and the curb, require a city permit for pruning and removal even though you maintain them. Larger trees on private property can also fall under permit requirements for removal depending on size and zoning, and some trees carry heritage status with additional protection.
Routine pruning of shrubs and small trees on your own property is generally not regulated. Removal of anything substantial often is.
The rules differ across the metro, so Gresham, Beaverton, Lake Oswego and unincorporated Multnomah County each have their own. Check with your city before removing anything significant, because the fines are real and they apply to the property owner, not the contractor. Our Portland landscaping permit guide covers the broader picture.
What Portland Homeowners Say
"Amazing work! They spent 5 hours taking two huge trailers of yard debris from our yard. Pruned trees and shrubs, removed shrubs and debris clean up. Very personable and professional." — Bill S., Google review
Two trailers from a single property is what a yard looks like when the pruning has been deferred for a few years. It is also why I suggest doing a little every fall instead of a lot every fifth one.
"Very happy. My back yard which it's pretty big, is so beautiful and clean. My trees are trimmed and look so good." — Trini D., Google review
FAQ's
1. How much does tree pruning cost in Portland, Oregon?
Shrub and small tree pruning runs $150 to $400 per tree, or $120 to $200 per hour for a two person crew. Large tree work through a certified tree service typically runs $400 to $2,000 or more per tree.
2. When should I prune trees in Portland?
Dead, damaged and dangerous wood can come out any time. Evergreen hedges and summer flowering shrubs take light fall pruning. Fruit trees, Japanese maples and most deciduous shade trees should wait for the dormant window in February or early March.
3. What should I never prune in fall?
Spring flowering shrubs including rhododendron, azalea, lilac, forsythia, camellia and big leaf hydrangea. They set next spring's buds in summer, so fall pruning removes the flowers.
4. Do I need a permit to prune or remove a tree in Portland?
Street trees in the planting strip generally require a city permit for pruning and removal, and larger private trees often require one for removal depending on size and zoning. Routine shrub pruning on private property generally does not. Check with your city first.
5. Does Golden Eagle prune large trees?
No. We prune shrubs and small ornamental trees we can reach from the ground. Anything requiring climbing or a lift, anything near a power line, and any large removal should go to a certified arborist or licensed tree service.
6. What is topping and why is it bad?
Topping is cutting a tree's main leaders back to stubs to reduce height. It produces weak, fast growing shoots that are more likely to fail in wind than the limbs removed, and it creates large wounds that never seal properly.
Have Someone Walk Your Property Before the Next Storm
If you want a set of eyes on your property before the next storm, I will walk it with you and tell you honestly what we can handle and what needs an arborist. That second part is free advice and it is worth having before the wind decides for you.