Land Plants - invasive

Italian Arum (Arum italicum) on Jan 21, 2026

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

Blackberries are a large concern surrounding my cottage to protect my siding and walls. Also Italian Arum and Lesser Celandine are propagating on my property rapidly.

Commentary

None

Remedy

Italian arum can be difficult to eradicate once established. Make sure to wear gloves and long sleeves and pants when removing it, as its sap can cause skin irritation. Do not compost or put in your yard debris, as this can lead to spreading of tubers which can grow into new plants. Home control methods can include carefully digging out the tuber and any daughter tubers and disposing in the trash. Cutting and disposing of the berries in the trash can help prevent spreading to new sites. Herbicide trials are still inconclusive, please contact your local Soil and Water Conservation District if you are interested in chemical control.

Resources

Washington State Noxious Weed Board info on Italian Arum

Location

I am once again asking for physical help or specific advice on how to fight blackberries, Italian Arum and Lesser Celandine. The blackberries are wild behind my home and come close to my siding. I don't want them getting under the siding and into my walls. Thank you, Catherine LeJeal

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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