Your Southeast Seattle, Washington Davey Tree Office

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

Our team regularly works in Bellevue, Issaquah, Kirkland, Medina, Mercer Island, Redmond, Sammamish, Seattle, and Woodinville, 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 Seattle, 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: Bronze Birch Borer causes 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: D-shaped exit holes, S-shaped larval tunnels, and heavy woodpecker activity indicate EAB infestation. Affected trees show canopy thinning, branch dieback, and bark splitting.

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. 

Some tree species, like birch, sycamore, silver maple, and redbud trees, naturally shed bark as they grow, while other species shed bark as a sign of disease, pests, or extreme temperature damage. If your tree has healthy-looking bark under the shed, then it’s usually safe. Read our blog to learn more about bark shedding.

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.