About
Programs
Events
Join
Shop
Donate
Contact Us
Member Login
Member’s Only

About
Programs
Events
Join
Shop
Donate
Contact Us
Member Login
Member’s Only

About
Programs
Events
Join
Shop
Donate
Contact Us
Member Login
Member’s Only

About
Programs
Events
Join
Shop
Donate
Contact Us
Member Login
Member’s Only

mulch

Talking Soil, Mulch, Amendments and more with Heather Havens of Concentrates NW

Expert Advice

Talking Soil, Mulch, Amendments and more with Heather Havens of Concentrates NW

Latest Bl

gs & Tips

Email address

Stay Connected with HPSO

If you're already a member, you're automatically on our weekly newsletter list.

Not a member yet? Sign up below to receive occasional updates, event highlights, and a peek into HPSO happenings.

Want to connect with people who love plants as much as you do?

CALL US

Cultivating curiosity, community, and a love of plants across the Pacific Northwest.

OUR OFFICE AT ELK ROCK GARDEN

11800 S Military Lane, Portland OR 97219

OFFICE HOURS

Mon-Thurs: 10:00 a.m. - 3:00 p.m

Facebook Instagram

Connect on Socials

© 2026 Hardy Plant Society of Oregon. All rights reserved. HPSO is a 501(c)(3) nonprofit organization. EIN: 93-0884453

QUICK LINKS

FAQ
Login
Blog

Support
Events
Contact Us

Terms and Conditions
Privacy Policy
Photography Credits

top