Earth Dance Design, Seattle Washington

American Society of Consulting Arborists

Edmonds Community College

International Society of Arboriculture - NW

Northwest Horticultural Society

Plant Amnesty

Northwest Perennial Alliance

Bellevue Botanical Garden

UW Botanic Gardens:
Arboretum and Center for Urban Horticulture

Kruckeberg Botanic Garden

WSU Hortsense

APLD - Washington Chapter