January is the best month for tree trimming in Portland OR because trees are fully dormant, pests and diseases are inactive, and cuts heal quickly when spring growth begins.

If you've been putting off tree trimming, January is your opportunity to get it done right. Portland's wet winters create the perfect conditions for dormant season pruning, and your trees will thank you when spring arrives.
Most Portland homeowners don't realize that timing matters as much as technique when it comes to tree care. Pruning during the wrong season can stress your trees, invite disease, and even stunt growth. But January? It's the sweet spot.
Trees in Portland enter dormancy between November and March. During this period, they're essentially resting, which means pruning won't interrupt their growth cycle.
Here's what makes January ideal:
The City of Portland specifically recommends winter pruning for most deciduous trees. For elm trees, they actually require pruning between October 15 and April 15 to prevent Dutch elm disease spread.
Not every tree follows the same schedule, but most common Portland varieties do well with January trimming:
Best for January pruning:
Wait until after flowering:
If you have trees hanging over your roof, January is the perfect time to address overhanging branches before they cause damage during late winter storms.
Pruning at the wrong time creates problems. Late spring pruning removes buds that would have bloomed. Fall pruning leaves wounds that heal slowly and attract pests.
September and October are actually the worst months for tree pruning in the Pacific Northwest. Trees are preparing for dormancy, and cuts made during this transition period leave them vulnerable.
By pruning in January, you're working with your tree's natural cycle rather than against it. The cuts you make now will be nearly healed by the time new growth starts in March.
Portland homeowners typically pay between $410 and $650 for professional tree trimming, depending on tree size and complexity. Larger trees or those near power lines cost more.
The good news? Regular tree maintenance saves you money long-term by preventing expensive emergency removals and property damage. A $500 trim now beats a $2,000 emergency call after a storm.
Walk your property and look for:
If your trees dropped debris into your gutters during recent storms, address both issues together. Clogged gutters combined with overhanging branches create ongoing maintenance headaches.
Don't wait until spring when trees are actively growing. January gives you the best results for your trees and your budget.
Ready to schedule tree trimming before the next storm hits? Contact Seasons Cleaning Services for professional tree care in Portland and the surrounding area.
We earn trust by delivering a consistently great experience. Clients return year after year, confident they’ll receive the same high-quality service.
Our skilled crews provide workmanship that impresses and holds up over time.
We offer fair, competitive pricing so customers can enjoy top-tier service without stretching their budget.