Resources

Arborist Information
ISA Certified Arborist: Code of Ethics https://pnwisa.org/page/codeofethics
Why Hire an Arborist? https://www.treesaregood.org/treeowner/whyhireanarborist
Tree information This site provides educational information about trees to the general public http://www.treesaregood.org/
Diseases
Pathogens Common to Many Plants Oregon State articles on environmental causes of plant decline. http://pnwhandbooks.org/plantdisease/pathogen-articles/common
Disease Diagnosis and Control http://pnwhandbooks.org/plantdisease
Gardening Answers Knowledgebase: Trees--Diseases and pests University of Washington Elizabeth Miller Library archive of searchable articles. http://depts.washington.edu/hortlib/resources/resource_search.php?term=516
Permits
Tree and Landscaping Regulations City of Seattle codes and regulations http://www.seattle.gov/sdci/permits/permits-we-issue-(a-z)/tree-and-vegetation-removal
Plants
Great Plant Picks A great resource for finding the best plants to grow in the Pacific Northwest https://www.greatplantpicks.org/
Pruning
Plant Amnesty Promote good pruning practices and fight 'the senseless torture and mutilation of trees and shrubs'. https://www.plantamnesty.org/