Organizations
National Trust for Historic PreservationNorthwest Horticultural Society
Pacific Northwest Garden Conservancy Forum
Other Resources
Alaska-Yukon-Pacific ExpositionCenter for Urban Horticulture
Ciscoe Morris
Garden Forever
History Link
National Register of Historic Places
Pacific Horticulture
Rainyside Gardeners
Seattle Plant Exchange
Blogs
Valerie EastonGarden Mentors
Shed Style (Debra Prinzing)