From the Arborists
Expert Tree Care Resources from Seattle Arborists
Download educational guides, articles, and reference materials from Seattle Tree Care's Certified Arborists covering tree health, wildfire preparedness, tree emergencies, hazard assessments, pests, diseases, and more.
Ask the Arborist – Visitor Question
Submit your tree care question to the Seattle Tree Care arborist team.
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Storm damage doesn't automatically mean a heritage tree needs to come down. If the damage is limited to a few branches and the rest of the tree is healthy and structurally sound, it may still have many years left. Damage to the trunk, major limbs, or roots is more concerning, especially if the tree is…
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Yes, even if a tree is invasive, you generally still need approval from the City of Seattle before removing it. Being invasive doesn't automatically mean the tree can be removed without going through the city's tree removal process. Seattle encourages homeowners to remove invasive species such as English holly, English laurel, and European mountain ash…
What to Expect After a Tree Falls on Your Property
By: Michael Black
Know exactly what to do after a tree falls, from insurance claims to cleanup and recovery.
How Artificial Turf Affects Trees
By: Steve Clary
Learn how artificial turf can impact tree roots, soil health, drainage, and the long-term health of your landscape.
Preparing for Seattle's Growing Wildfire Risk
By: Michael Black
Discover why wildfire risk is increasing in the Pacific Northwest and what homeowners and communities can do to prepare.
What to Do When a Tree Becomes Dangerous
By: Michael Black
A hazardous tree doesn't always mean removal. See how arborists determine the safest path forward.
How Arborists Assess Hazard Trees
By: Michael Black
Learn how Certified Arborists identify tree defects, evaluate failure potential, and determine the level of risk.
What to Do During a Tree Emergency
By: Michael Black
Learn what steps to take after storm damage or a tree failure and when it's time to call an arborist.
Post Planting Guide
This proactive approach diminishes future pruning requirements for mature trees.
Pear Trellis Rust
The disease exhibits a complex life cycle involving two
host plants, Pear and Juniper.
Sequoia Pitch Moth
This chewing moth feeds on coniferous trees such as pines, firs, and spruce.