Member Login
Search
Home
About
Board of Directors
Committees
Giving to HPSO
Volunteering
Grants & Scholarships
Staff
Press
Activities & Benefits
Open Gardens
Speaker Programs
Plant Sales
Hortlandia
PlantFest
Community Forum
Quarterly Magazine
Retailer Discounts
Garden Travel
Study & Interest Groups
After Hours
Plant Nerd Night
Study Weekend
Annual Meeting
Resources
Member Blogs
Gardens
Education
Societies
Seed Sources
Events
Blog
Join
Join
Renew
Gift Membership
Contact Us
Members Only
Login
Member Center
Member Login
Search
Home
About
Board of Directors
Committees
Giving to HPSO
Volunteering
Grants & Scholarships
Staff
Press
Activities & Benefits
Open Gardens
Speaker Programs
Plant Sales
Hortlandia
PlantFest
Community Forum
Quarterly Magazine
Retailer Discounts
Garden Travel
Study & Interest Groups
After Hours
Plant Nerd Night
Study Weekend
Annual Meeting
Resources
Member Blogs
Gardens
Education
Societies
Seed Sources
Events
Blog
Join
Join
Renew
Gift Membership
Contact Us
Members Only
Login
Member Center
Links to the horticultural sites of other educational and non-profit organizations:
Arnoldia
Butterfly Web Site
Cabrillo College Horticulture
Clematis Database at Hull University
Cornell University
Elisabeth C. Miller Library, Center for Urban Horticulture, University of Washington
Great Plant Picks
Illinois Cooperative Extension Service
Iowa State University
Juniper and Sage
Museum of Garden History
National Public Radio/Talking Plants
NatureScaping of SW Washington
New Jersey Agricultural Weed Gallery
Ohio State University
Oregon Association of Nurseries
Oregon Metro - Natural Gardening
Oregon State University Extension Master Gardeners
Oregon State University Horticulture
Pacific Horticulture
Perry's Perennial Pages
Seattle Tilth
Trees of the Pacific Northwest
University of British Columbia Garden & Center for Plant Research
University of California Weed Photo Gallery
University of Connecticut Plant Database
USDA Plants Database
Washington State University
Member Login
Search
Quick Links
Join Today
Renew Membership
Gift memberships
Donate to HPSO
Contact Us
Upcoming Events
Tue Feb 18, 2025
‘Bedrock: The Making of a Public Garden’ with Jill Nooney (Zoom presentation)
Category: Programs
Sun Mar 16, 2025
Plant Nerd Night (Afternoon) 2025
Category: Programs
Fri Apr 4, 2025
Hortlandia 2025: Spring Plant Sale
Category: Events
Sat Apr 5, 2025
Hortlandia 2025: Spring Plant Sale
Category: Events
View Event List
