Garlic Mustard

(Alliaria petiolata)

Garlic mustard is a cool season biennial herb with stalked, triangular to heart-shaped, coarsely toothed leaves that give off an odor of garlic when crushed. First-year plants appear as a rosette of green leaves close to the ground. Rosettes remain green through the winter and develop into mature flowering plants the following spring. Flowering plants of garlic mustard reach from 2 to 3-½ feet in height and produce button-like clusters of small white flowers, each with four petals in the shape of a cross.

Read more about Garlic Mustard and how to recognize and control it at CISMA-SuAsCo

Reported Locations

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Report Invasive Species

If you see an invasive species like in Littleton, please fill out a report so we can track it and try to control it.

Learn More About Invasive Species

LCT Trustee Rick Findlay has compiled information on many invasives common in our area on our Invasives Project page. The Cooperative Invasive Species Management Association for the Sudbury, Assabet and Concord river watersheds also offers extensive information on invasive species. LCT is a member of CISMA-SuAsCo.