Skip to main content

Water HemlockFenwick-Hollowell Wetlands Trail

Water hemlock (Cicuta maculata)


The water hemlock is a perennial herb with compound pinnate leaves in an alternate arrangement. The leaves decrease in length from the bottom to the top of the plant. Its small white flowers occur in clusters, blooming in the summer and fall. The water hemlock is found in wet areas, such as meadows and swamps.
Cicuta maculata

Gardening Tips

Care Known Problems How to Harvest Mature Size Notes/Uses
Water hemlock grows well in moist to wet soil that is loamy or sandy; It prefers full to partial sun Water hemlock is extremely toxic and can cause death in humans and livestock, particularly upon ingestion of the roots; Symptoms include nausea, vomiting, tremors, cramps and convulsions n/a Up to six feet tall The Water hemlock provides nectar and food for a variety of insects