Land Plants - invasive

Tree of Heaven (Ailanthus altissima) on May 22, 2023

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

Seedlings and saplings growing throughout my leeks.

Commentary

None

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

I believe I have a batch of young tree of heaven sprouting in my veggie garden. I think I got a bad batch of wood chips. Plants are young, but some are starting to grow 2-3 ft tall

It is along my fence, near wood shed and rain water collection

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

© 2025 Portland State University | Contact us for questions regarding site content