Ask an Arborist Coming Soon!
Ask an Arborist Coming Soon!
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Tree Bark, News From Urban Forestry - All Trees, No Pulp
May 2020, published twice a month
Got Tree Questions? Get Answers During "Ask an Arborist"
Ferns growing out of the trunk of a tree. A problem with the leaves on a madrone tree.
Are moss, lichen, or ferns hurting my tree? What is wrong with the leaves on my tree? These are common questions that tree professionals hear. Do you have a tree question you have been waiting to ask? Your wait is over, Ask an Arborist is here!
Why do leaves change color in the fall? Is it bad for moss to grow on trees? And what is really the problem with tree of heaven in Portland? PP&R Urban Forestry arborists want to hear from you!
An arborist is a professional who specializes in the care, management, and study of trees. What are some of the questions you have about trees? Is there something you have always wanted to know about that one interesting tree in your neighborhood?
Our arborists will answer your questions in a live question and answer presentation on June 16, 2020 at 1:00 pm.
Registration is required to ask questions, so sign up today!

Ask your tree question and submit photographs online by June 5 here.

Watch on June 16 at 1:00 pm as Urban Forestry arborists answer your questions live!

Register here.

Upcoming Events

Opportunities to learn and volunteer!

Understanding trees from the inside out helps when it is time to prune!

Advanced Tree Pruning
Wednesday, June 3, 2020, 11:00 am - 12:00pm
Offered Online via Zoom

Many arborists will tell you that pruning is both a science and an art; the art of making a proper cut matched with an understanding of the tree’s biology and mechanics.

Learning how trees grow and how they respond to various pruning cuts will help you master common pruning techniques.

Urban Forestry staff will host an online Advanced Pruning class on June 3, 2020; prior participation in an introductory pruning class is recommended.

Please pre-register, Zoom details to participate will be sent by email.

The workshop will begin promptly at 11:00 am with the presentation followed by a question and answer period.

For questions, please contact:

Register here.

A YCC Tree Crew member removes weeds around a young tree.

How to Care for Your Young Tree
Thursday, June 11, 2020, 12:00pm - 1:00pm

Offered Online via Zoom


Summer starts on June 20, 2020! Are you and your young tree ready for the heat?
The first three to five years may be the difference between a young tree dying or doing great!
That is why taking special care to give your new tree a good start is so important. 
In this online workshop, Urban Forestry staff will help you know what to look for, so you can be confident that young trees in your neighborhood are going to be the best they can be.
Please pre-register, Zoom details to participate will be sent by email.

Register here.

More Upcoming Events

5/15/2020, LAST CHANCE! Local Tree Care Providers Workshop: If you work on trees within the city limits of Portland, then this online workshop is for you! Learn about tree permits and how to submit applications. Urban Forestry Staff will be online to answer your questions. Please pre-register, after you register, we will send out the link to participate. On May 15, you can use this link to enter the workshop starting at 8:30 am. Then the workshop will run from 9:00 am to 12:00 pm. Register here.

May Pop-Up Arboreta: For the month of May, Urban Forestry will be installing fun, informational signs on select trees in Woodlawn, Ventura, Dawson, and Couch Parks. If one of these is your local park, be sure to visit before the signs are gone! While you are out there, tag @portlandparks on Instagram or @Urban Forestry - Portland Parks & Recreation on Facebook and let us know which tree is your favorite park tree. Then get ready for the next round of Pop-Ups in June! View the summer Pop-Up schedule hereRemember – do not go into parks or onto trails if you cannot stay at least 6 feet away from other people. Respect park facility closures, such as sports courts, skateparks, and athletic fields.

Events Highlights

See photos from recent events!

A slide from the Introduction to Pruning Workshop that identified Urban Forestry staff.

First Online Workshop Completed, More to Come!

Urban Forestry hosted its first live online workshop on Saturday, May 2 with an Introduction to Pruning class.

The live presentation was recorded, and we plan to share it soon. Keep an eye out in Tree Bark when it becomes available!
For now, check out this cheat sheet to see what you missed!

Tree people from across the city logged on to learn about:

  • Goals of Tree Pruning
  • How to Get a Permit
  • Tools and Safety Materials
  • How and Where to Cut
We loved seeing so many of you (about 50!) and your excitement to prune Portland's trees. We hope to see many more of you at the Advanced Pruning workshop next month.

In Other News

Tree Code Survey Closes 5/15/20, Share Your Ideas TODAY: Should we strengthen tree protections? Should we require more trees to be planted when they get cut down? These may sound like simple questions, but when it comes to the Tree Code, there is a lot to think about. Join over 1000 people who have already shared their opinions. In October, the City of Portland will be considering two proposals to strengthen tree protections and planting requirements for construction projects on private and public property. Will you add your voice to how Portland protects our trees before the amendments are completed? Take the 5-minute survey here! Need information first? Read more here.
Plants for a Better Planet, Great Plant Picks Has an Updated 2020 Plant List: Drought-tolerant, pollinator-friendly, and/or native plants are on display at Great Plant Picks. Do not be scared off by all the lists! Each tree and plant has a picture, so once you decide where you want to plant, you can visualize what it will look like in your space. Read more about the 2020 updates in Digger magazine here.
SOLVE Brings At-Home Solutions for Oregon: Small acts can make a big difference. If you have the time and ability to help out, SOLVE's website has lots of good ideas that do not require a group to accomplish. Learn about invasive plants to keep out of your yard and off of your trees. Or safely pick up litter around your yard or neighborhood. But first, be sure to check out the list of what to avoid here.
Urban Forestry
1900 SW 4th Ave., Portland, OR 97201503-823-8733
Portland Parks &
Mayor Ted Wheeler • Director Adena Long

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