Education/Schools
- University of Washington Center for Urban Horticulture
- Washington State University Turf Program
- Spokane Community College Landscape Management
- Lake Washington Institute of Technology
- Edmonds Community College
Pest Management
Lawn Management
State Agencies/Boards/Departments
- Washington State Department of Agriculture
- Washington State Department of Ecology
- Washington State Department of Labor & Industries
- Washington State Department of Natural Resources
- Washington State Department of Revenue
- Washington State Farm Bureau
Affiliated Associations
- American Horticultural Society
- American Society of Landscape Architects
- Association of Professional Landscape Designers
- Association of Professional Landscape Designers – Washington Chapter
- Department of Agriculture-Natural Resources Conservation
- Department of Water and Land Resources
- Elisabeth C. Miller – Horticultural Library
- Guide to Landscaping and Gardening
- International Erosion Control Association
- International Society of Arboriculture
- Irrigation Association
- King County Green Gardening
- NALP – National Association of Landscape Professionals
- Washington State Nursery & Landscape Association
- Western Washington Golf Course Superintendents Association
Networking