Water Hemlock

About Water Hemlock

Water Hemlock is a stately but formidable member of the carrot family, recognized as one of the most toxic plants native to North America. This tall perennial can reach heights of three to six feet, featuring large, lacy, bi-pinnate leaves and broad, flat-topped clusters of tiny white flowers known as umbels. It blooms from mid-summer into early fall and is typically found in very wet habitats, such as marshes, swamps, and along the edges of slow-moving streams. Despite its extreme toxicity to humans and livestock, it has significant ecological value, providing nectar for a vast array of beneficial insects, including predatory wasps and various butterflies. It also serves as a larval host for the Black Swallowtail butterfly. In a restoration context, it is a valuable component of wetland biodiversity. However, it should be handled with extreme caution and is generally not recommended for home gardens where children or pets are present. If you choose to include it in a large-scale wetland restoration, ensure it is placed in a location where it will not be accidentally grazed or handled.