Your Portland, Oregon Davey Tree Office

We proudly provide professional tree care services throughout Portland and the surrounding communities. 

Our team regularly works in Beaverton, Brush Prairie, Camas, Gresham, Lake Oswego, Portland, Vancouver, Washougal, and West Linn, offering expert tree trimming and pruning, shrub care, tree removal and planting, tree inspections, and plant health care. If you’re not sure whether we service your area, just give us a call — we’re happy to help. 

In Portland, some of the most common tree pests and diseases include Lace Bugs, Bronze Birch Borer, and Emerald Ash Borer. Here are signs and symptoms of how these pests and diseases can affect your trees. 

• Lace Bugs: Leaves with a bleached appearance, early leaf drop, and black, shiny lace bug excrement on the undersides of leaves. Unlike spider mites, lace bugs do not produce silky webbing.
• Bronze Birch Borer: Discolored and thinning leaves in the upper canopy of the birch tree, dead branches at the top, and swollen ridges along the trunk and branches.
• Emerald Ash Borer: Attacked trees show canopy thinning, branch dieback, and bark splitting, starting in the upper canopy and progressing downward over several years.

A Plant Health Care (PHC) Program is a proactive, year-round plan to keep your trees and shrubs healthy and pest-free. Our certified arborists focus on prevention and early detection by monitoring soil health, nutrients, insects, and disease. Based on your property’s needs, we create a customized care plan that may include fertilization, pest management, pruning, and soil improvement. 

The best time to treat emerald ash borer in the Pacific Northwest is mid-to-late spring, typically April or May, after trees leaf out, but before the beetles lay eggs. Read our blog to learn more about the emerald ash borer and how to treat it.

Beaverton, OR experiences warm, dry summers and cool, wet winters. These extreme weather patterns can stress trees out, making them more susceptible to insect and disease outbreaks and storm damage. Read our blog to learn more about the signs and symptoms of tree stress.

Yes! Large trees like Douglas firs require specialized care, and professional certified arborists have the knowledge and skills necessary to provide that care safely and efficiently. Read our blog to learn more about the benefits of hiring a professional certified arborist. 

Yes! Mulching around trees helps retain soil moisture, reduce weeds, improve soil nutrients, and regulate root temperature. Without mulch, tree roots must compete with grass for water and nutrients, which can slow growth and weaken the tree. Learn more about the benefits of mulching in our blog.

For best results, apply 2–3 inches of organic mulch around the tree, keeping it a few inches away from the trunk. Proper mulch installation is essential for the long-term health of your trees and plants.