June Weed of the Month: Poison Hemlock noxious weed status change Poison hemlock sap contains toxins that can be absorbed through skin

by Julia Dellick, Minnesota Department of Agriculture
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(photo by Minnesota Department of Agriculture)
Poison hemlock blooms from May to August. It has small white flowers grouped in clusters at the ends of its branches, with each cluster measuring 3-6 inches in diameter.


Frandsen 10.15.2025