Land Plants - invasive

Tree of Heaven (Ailanthus altissima) on Sep 10, 2026

Description of specimen

Submitter does not have a specimen
EDRR Status: Local expert notified

Young ToH on WLHS property

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

Behind chain link fence, next to sidewalk. It is actually located on Skyline Dr across the street from the main HS bldg and football field, next to Skyline parking lot entrance.

Expert Reviewer

Avatar of Reviewer

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

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