Land Plants - invasive

Tree of Heaven (Ailanthus altissima) on Aug 23, 2026

Description of specimen

Submitter does not have a specimen

See above

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

Two locations at Hosford Middle School. One where the pin is dropped, growing along the wall of the building to the left (north) of the blue doors. The other is in a planter along SE Grant Street at the northwest corner of the building.

Expert Reviewer

Avatar of Reviewer

Whitney Bailey
EMSWCD

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