What’s New: New Roots
The New Roots blog summarizes tree events and experiences in the larger Concordia neighborhood forest.
ALA is officially accredited!
Great news: in November 2025, Arbnet officially issued an approval for the Ainsworth Linear Arboretum to be accredited as a community arboretum (Level 1).
Meet Tom Breuckman, Tree Team
Tom joined the Team after noticing the signs along the Ainsworth Linear Arboretum and building connection with the neighborhood forest.
What a time! October 4th Celebration Recap
It was a blast. We planted trees, were inspired by city leaders, and ate cake, all to celebrate the Ainsworth Linear Arboretum.
October 26th Tree Walk and Pruning Workshop
Practice your pruning chops at the Concordia Living Landscapes Arboretum with the CTT
October 4 Party — Happy Birthday to the ALA!
On October 4th, the Concordia Tree Team invites you to celebrate the 20th anniversary of the Ainsworth Linear Arboretum.
Oregon Field Guide: Threats to Trees from the Emerald Ash Borer Beetle
Raywood ash make up about 15% of all median trees in the Ainsworth Linear Arboretum, or about one in eight trees. Unless treated, these are likely to be killed by Emerald Ash Borer in the future.
Who needs the gym? Join the Watering Club
Get the heavy weight lifting muscle build you are looking for with hauling 5 gallon jugs of water to trees in need!
Herculean effort by Concordia Tree Team saves trees at International Grove
Autumn Voirol providing on Aug. 1 some of the 98 gallons of water given the blue Atlas cedar transplanted within the International Grove.
Summer is here: time to water!
Starting in June, many younger Arboretum trees will need a summertime steward to water them regularly. Please sign up and support a tree through the dry season!
Summer Color Guided Walk
As you walk the Ainsworth corridor, enjoy the summer blooms of color.
Did you pedal by the trees during Sunday Parkways?
Trees are an important part of a fun Sunday Parkways. Concordia Tree Team members welcomed bikers to connect with the neighborhood forest on a sunny June 29th outside Fernhill Park.
Neighbor stories: Kepper Petzing, A Neighbor of the Ainsworth Linear Arboretum for 43 Years
Neighbors who have lived in the Ainsworth Linear Arboretum tell their memories of living with these trees.
Meet Autumn Voirol: Concordia neighbor and Tree Team member
Autumn is one-of-a-kind in engaging others and sharing her enjoyment of trees, whether leading restoration projects or making sure to capture photos of all we do
Serious Sweatwork: Relocating a Monkey Puzzle Tree
Concordia Tree Team members saved a healthy tree in the International Grove by relocation
New trees find their way to Fernhill Park
Incense cedar and bald cypress have been added to Fernhill Park tree diversity
Median refresh in the ALA — April 12
New path planning and planting refresh on the Ainsworth Linear Arboretum — work party on April 12
Spring Color Guided Walk
Follow a Spring Color Guided Walk on the Ainsworth Linear Arboretum
Calling Watering Wizards! at the Concordia Garden Fair
On a rainy spring day, Concordia Tree Team members recruited neighbors to act as summertime watering stewards. Interested in helping our young trees to avoid heat and drought stress?
Tell us your Concordia Tree Story
Is there a special tree with a story in the Concordia neighborhood forest? We want to know!