Land Plants - invasive

Tree of Heaven (Ailanthus altissima) on Aug 21, 2026

Originally reported as Unknown

Description of specimen

Submitter does not have a specimen

One single stalk with multiple single branches out that look sort of like many smaller palms.

Commentary

Avatar of commenter That is indeed tree of heaven. Here's more information.

https://tualatinswcd.org/species/tree-of-heaven/

If you'd like specific control, please send me an email at the address below.

Since these are widely dispersed, like blackberry, we don't have the resources to control this for landowners. If you'd like to continue documenting their presence in our community, I'd suggest making posts on the iNaturalist app. We incorporate that data into our invasives work and it would be beneficial if we were to get more funding to work on tree of heaven in the future.

Keith Nasman
Invasive Species Technician
Tualatin Soil & Water Conservation District
keith.nasman@tualatinswcd.org

Keith Nasman
Aug. 27, 2026, 8:59 a.m.

Remedy

Check out a really thorough guide regarding tree of heaven identification and control OSU’s Solve Pest Problems: https://solvepestproblems.oregonstate.edu/weeds/tree-of-heaven

The Portland metro-area Cooperative Weed Management Area also has some great best management practices for handling this weed The 4 County CWMA: https://4countycwma.org/assets/best-mgmt-practices/tree-of-heaven-bmp_final.pdf

Resources

https://solvepestproblems.oregonstate.edu/weeds/tree-of-heaven

https://4countycwma.org/assets/best-mgmt-practices/tree-of-heaven-bmp_final.pdf

Location

In my neighbors yard (non-fenced area) that is open to our yard. Abundant blackberry bushes and several of these plants growing from within the bushes.

Expert Reviewer

Avatar of Reviewer

Keith Nasman
Tualatin SWCD

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