Poison Hemlock (Conium maculatum) on Mar 27, 2025
Originally reported as Cow Parsnip (Heracleum maximum)
Submitter has sample
EDRR Status: Local expert notified
Description of specimen
Near my mailbox across Highway 240 from my residence there is a large patch of giant hogweed starting to grow. I have noticed along the creek bed and in the drainage ditches. It’s toxic to animals and I’d like advice on removal for the safety of my livestock and children.
I am linking some helpful resources when dealing with and identifying this species. As I mentioned, digging can be an effective method of removal but be sure to use gloves and long sleeves at a minimum. Burning and/or mowing of this species are not recommended as smoke and aerosolized sap can be toxic. Disposal of the plants in trash bags is recommended as well.
https://yamhillswcd.org/poison-hemlock/
https://kingcounty.gov/en/dept/dnrp/nature-recreation/environment-ecology-conservation/noxious-weeds/identification-control/poison-hemlock
Jacob Argueta
March 31, 2025, 8:38 a.m.