Hoyt Arboretum Friends (HAF) is a membership-based, nonprofit organization working in partnership with Portland Parks and Recreation to support Hoyt Arboretum.

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Native Conifers of Northwest Oregon

Wednesday, February 17
9am-12pm

Expand your knowledge of native conifers with Instructor Ken Denniston (author of nwconifers.com). Ken will help you identify the local conifers of northwest Oregon. The workshop will include classroom instruction and, weather permitting, a tour of native conifers in Hoyt Arboretum. Learn easy ways to distinguish each conifer species using both photos and specimens. Class attendees will receive a handy cheat sheet to identify native conifers with 99% accuracy.

About the instructor: Ken Denniston has been hiking the forests of Oregon for over 50 years. During that time, he has learned how to identify each species of our native conifers.  Recently, he completed the Oregon Master Naturalist Program from Oregon State University. He is the author of the Northwest Conifers website (nwconifers.com) and volunteers at Hoyt Arboretum, leading tours of the native trees in the conifer collection.

Limited to 15 people. $15/member, $20/non-member. This class is now full. Please email info@hoytarboretum.org or call (503) 823-1649 if you would like to be added to the wait list or see below for the class scheduled on April 13 or May 7.


Planting for Pollinators Using Native Plants

Wednesday, February 24
10am-11:30am

Discover how beautiful native plants can bring these allies to your yard, helping fight pests and improve garden productivity. Learn which natives might be right for your yard and how to plant and care for them without harmful garden chemicals. Learn effective ways to control pests without harming bees, find attractive plants to provide pollen, nectar and habitat in every month of the year and get tips for attracting pollinators of all sorts. Plus, find out where to get native plants in your area.

About the instructor: Glen Andresen has been Metro’s lead natural gardening educator since 1994. Glen has been a Master Gardener since 1991. He is an avid beekeeper who keeps approximately 80 colonies of bees. This year his city bees produced about 4,000 pounds of honey. He teaches backyard organic beekeeping classes throughout the Portland area. He also is the host of the long-running hour-long edible gardening show, "The Dirt Bag," on the community radio station KBOO, at 90.7 FM in Portland. 

Limited to 15 people. $10/member, $15/non-member. Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649. 

Member / Non-Member

Mosses, Lichens and Liverworts

Wednesday, March 9
9am-12pm

Mosses, lichens and liverworts are vitally ecologically important in sustaining the web of life. This is an opportunity to satisfy your curiosity about mosses, lichens and liverworts.

Participants will have an opportunity to learn about the biology, evolution, ecology, ethnobotanical uses and cultural anthropology of mosses, lichens and liverworts, as well as their role in fighting global climate change, improving urban air quality and as an integral member of the temperate rainforest ecosystems of the Pacific Northwest. Participants will also have an opportunity to learn some of the primary species found in and around Portland and an opportunity to identify and experience many of these species in the field.

About the instructor: Daniel Salomon holds a MA in Research as well as a Graduate Certificate in Science and Religion. His undergraduate work included biology and environmental studies. He is an accomplished author with six books on the environment. He is a Hoyt Arboretum citizen scientist, herbarium archive assistant and tour guide. 

Limited to 15 people. $15/member, $20/non-member. This class is now full. Please email info@hoytarboretum.org or call (503) 823-1649 if you would like to be added to the wait list or notified of future classes. Thank you! 


Beautify Hoyt Arboretum For Arbor Month!

April 2, April 22, April 29 and April 30

Getting dirty at the Arboretum has never been easier!

We're inviting all who are able to come help us with some mulching, trail work, trimming, hauling, weeding, etc. There are four opportunities for you to help us throughout the month, April 2, 22, 29, and 30th. 

The work this group will do will help us get our grounds in tip top shape this very important month.... Arbor Month!

If you're interested, you should expect to get super dirty, meet some really fun people, and feel sore the following day from a good morning's work. We have all the tools and gloves, but you should wear clothes you don't mind getting messy and that are appropriate for the weather.... it's Portland, so it's probably a safe bet that it might rain.

The last thing to bring along is snacks! No one likes to be hungry, so please come prepared.

If you are interested in helping us out, please register here


Botanical Illustration with Water Color

Saturday, April 9, 11am-2 pm

Whether you are a budding artist wanting to learn about botany or a plant lover eager to hone your botanical illustration skills, this class is for you! Instructor Ruth Williams will teach students the basics of botanical illustration so that they can complete one or two watercolors.

About the Instructor: Ruth is an arborist and plant enthusiast with a degree in Horticulture from UC Davis. At Hoyt Arboretum, she leads tours and teaches plant identification and botanical illustration. She lives in Southeast Portland with two heritage California Bay Laurels, her husband, and six chickens. 

Limited to 15 people. $15/member, $20/non-member. Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  

Member / Non-Member

Native Conifers of Northwest Oregon

Wednesday, April 13
9am-12pm

Expand your knowledge of native conifers with Instructor Ken Denniston (author of nwconifers.com). Ken will help you identify the local conifers of northwest Oregon. The workshop will include classroom instruction and, weather permitting, a tour of native conifers in Hoyt Arboretum. Learn easy ways to distinguish each conifer species using both photos and specimens. Class attendees will receive a handy cheat sheet to identify native conifers with 99% accuracy.

About the instructor: Ken Denniston has been hiking the forests of Oregon for over 50 years. During that time, he has learned how to identify each species of our native conifers.  Recently, he completed the Oregon Master Naturalist Program from Oregon State University. He is the author of the Northwest Conifers website (nwconifers.com) and volunteers at Hoyt Arboretum, leading tours of the native trees in the conifer collection.

Limited to 15 people. $15/member, $20/non-member. Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  

Member / Non-Member

Diagnosing Plant Problems 

Wednesday, April 27
9am-12pm

You know when your plants are not doing well, but do you know how to determine what is causing the problem? This hands-on class will take you through the steps in diagnosing plant problems so you can decide how to manage them. Feel free to bring in samples of your plant problems and we’ll try to determine what’s wrong. We will also head outside to learn how to apply these same steps to plants in the landscape.

About the instructor: Lorraine Brooks is the Volunteer and Education Coordinator for Hoyt Arboretum Friends. She has been a horticulturist for more than 30 years and has been teaching pest diagnosis and management to gardeners and horticulture students for almost 15 years. 

Limited to 15 people. $15/member, $20/non-member. Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  

Member / Non-Member

Native Conifers of Northwest Oregon

Saturday, May 7
1-4pm

Expand your knowledge of native conifers with Instructor Ken Denniston (author of nwconifers.com). Ken will help you identify the local conifers of northwest Oregon. The workshop will include classroom instruction and, weather permitting, a tour of native conifers in Hoyt Arboretum. Learn easy ways to distinguish each conifer species using both photos and specimens. Class attendees will receive a handy cheat sheet to identify native conifers with 99% accuracy.

About the instructor: Ken Denniston has been hiking the forests of Oregon for over 50 years. During that time, he has learned how to identify each species of our native conifers.  Recently, he completed the Oregon Master Naturalist Program from Oregon State University. He is the author of the Northwest Conifers website (nwconifers.com) and volunteers at Hoyt Arboretum, leading tours of the native trees in the conifer collection.

Limited to 15 people. $15/member, $20/non-member.  Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  

Member / Non-Member

Ethnobotany

Wednesday, May 11
11-2 pm

Many of the plants which we ignore on our walks in the woods actually played an important part in the everyday lives of North American indigenous people. And many people are surprised to learn what they considered as delicacies, such as grubs, baby birds, grasshoppers. Roger will also talk about how they used various trees for housing and weapons as well as the challenges of foraging for their livelihood. Among this seemingly primitive existence, indigenous people knew how to make aspirin, which they used for headaches and soothing aches and pains encountered at the "office."

About the instructor: Roger Nibler has been conducting tours at Hoyt Arboretum since 1987. Roger's particular area of interest is the many uses of plants by the Native North Americans. He also enjoys giving survival tips regarding plants to eat and avoid for those who might get lost in the woods with minimal gear. 

Limited to 15 people. $15/member, $20/non-member.  Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  

Member / Non-Member

Everything in the Kitchen Sink! How to create natural dyes from scraps

Saturday, May 14
11-2 pm

In partnership with Rewild Portland, students will learn the basics of natural dye techniques, a few ways to get color out of what they already have in the kitchen, and an easy technique to get started experimenting with natural dyes.

The class will also include a walk around the arboretum to discuss other common plants that are great for dyes, inks, and other natural crafts. To tie everything together, students will be using a technique called eco printing or bundle dying to make beautiful prints on silk scarves to take home!
Supplies: Students should bring a pen and a notebook.

About the instructor: Sarah Hill is a naturalist and youth program instructor with Rewild Portland. She holds a degree in Life Science from the University of Portland and is currently in charge of the cultural education programs at the Ridgefield National Wildlife Refuge.

Limited to 15 people. $15/member, $20/non-member.  Registration is required. Sign up below via Paypal, or contact Becky Schreiber at (503) 823-1649.  
Member / Non-Member
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