• Treekeepers of Washington County programs
• Master Gardeners
• Ash & Oak Folk Workshop
• EMSWCD Online Workshops

Treekeepers of Washington County programs

We work to protect and advocate for trees in urban unincorporated Washington County. Don’t miss our upcoming events! Visit the Treekeepers website to learn more and sign up for our monthly newsletter.

Class: Making and Using Oak Gall Ink

Sunday, November 2, 10-11:30 am, The Village Gallery of Arts, 1060 NW Saltzman Rd., $25 members/$30 non-members

Learn about Oak Gall Ink—from its history and the galls’ formation to clear instructions on how to make it—followed by the opportunity to use it for drawing and/or calligraphy. We’ll provide instructions on both of these uses. This class will be held at The Village Gallery of Arts in Cedar Mill. We’ll also hold a drawing for an ink-related item. Proceeds will benefit Treekeepers of Washington County. Registration is limited, with an October 31 deadline.

Ivy Pulls: Join Our On-Call Ivy Crew

October-March, dates and locations will vary, free

English ivy hangs on through winter at a time trees are particularly vulnerable. The invasive vines keep growing while trees are dormant, and the excess weight can increase risks for trees during winter storms. Help us save trees by removing ivy and other invasive plants that threaten them. Weather makes it hard to schedule events, so please, sign up and we’ll notify you when there is a good weather window so we can schedule an ivy pulling event.

Master Gardeners

The Washington County Master Gardener™ Association (WCMGA) sponsors a wide variety of gardening–related demonstrations, lectures, seminars and workshops in various Washington County Oregon locations. Most of our events are free and open to the public. The WCMGA is a 501c3 non-profit supported by hundreds of volunteers, who work to educate the public about sustainable, affordable gardening.

Rainwater Harvesting for Landscape Use

Tuesday, October 7, 7-8pm, Zoom, Pre-registration required

Harvesting rainwater conserves resources, reduces water bills and helps landscapes survive in drought or water restriction periods. This session will introduce the basic concepts of how to collect, store, and distribute rainwater.

Lawn Be Gone

Saturday, October 18, 10 am-12 pm, PCC Rock Creek Campus, Building 4, Room 103 and WCMGA Education Garden at PCC Rock Creek, free

This class will explain turf removal methods, options for what to plant in its place (e.g., ecolawn, drought tolerant plants, native plants). We will also discuss planning, soil prep, planting tips, and touch on irrigation options. Open to the public, no registration needed.

Forests in Flux: Understanding Tree Health, Decline, and Resilience in NW Oregon

Tuesday, November 4, 7-8 pm, Zoom, Pre-registration required

In this talk, we will explore the current state of the science of forest and tree health in NW Oregon.

2026 Master Gardener application opens soon

Are you passionate about gardening? Would you be interested in sharing your passion and sustainable, research-backed gardening knowledge with fellow community members? If so, consider becoming an OSU Extension Master Gardener (MG) volunteer!

MG volunteers receive comprehensive, university-level gardening education and serve as garden educators. Choose from a multitude of volunteer opportunities throughout the metro region. Join a cohort of learners who support the growth of Oregon’s gardeners!

Applications for the 2026 Master Gardener Training open early October. Learn how to become a Master Gardener.

Ash & Oak Folk Workshop

Tuesday, October 14, 5-6 pm, online via Zoom, register to participate

This fall, at West Multnomah Soil & Water Conservation District, we’re looking for Ash and Oak Folk, a new type of community scientist, to learn to identify threatened oak and ash trees and make reports of healthy and sick ones to the proper scientific sources. If you’d love a mix of scavenger hunt, nature walk, and science project, this is the event for you.

We want to get as many people as possible to participate in learning about the Oregon Oak and Oregon Ash trees and the invasive Eastern Ash Borer and Mediterranean Oak Borer bugs that are threatening them in our region. Participants will learn how to track trees on the iNaturalist app, and make reports of sick trees on OregonInvasivesHotline.org.

Learn more and register here.

EMSWCD Online Workshops

Everyone benefits from green spaces in our neighborhoods. When we care for our gardens and yards, we can support plants and wildlife, have cleaner water, and even connect with neighbors.

Do you want to change your landscape but are not sure where to start? Attend a FREE webinar or in-person workshop for expert guidance from East Multnomah Soil & Water Conservation District experts! You will discover practical gardening tips that will give you the confidence to take on your next project and bring your landscape vision to life.

Landscaping for Wildlife Workshop

Thursday, October 9, 6-7 pm, register for zoom link

When it comes to attracting beneficial wildlife to an outdoor space, it’s all about food, water, and shelter. This workshop will provide a broad and brief overview of Naturescaping concepts and then dive into simple and creative ideas for making your space a place where birds, butterflies, bugs, and more will want to come flocking.

Native Plants Workshop

October 15, 6-8:30 pm, register for zoom link

Find out about the many benefits of gardening with native plants! You’ll receive loads of information that will help you decide which native plants will work well in your yard. We will introduce you to common native plant communities in Portland, show examples of species that do well in similar growing conditions, and share successful planting tips that will help them thrive!

Visit the EMSWCD website to learn more and see their full lineup of classes and workshops.