News, Stories, and Field Notes from the Growing Center

Save Pollinators; Dispose of Black Swallow Wort

Black swallow wort is rampant in Somerville yards. And it is evil. Because of its similarities to milkweed, it tricks monarch butterflies into laying eggs on it and then the caterpillars are killed when they eat its toxic leaves. Green & Open Somerville and the Somerville Community Growing Center have a solution... If you pull up the black swallow wort in your yard or in our parks (i.e., Morse Kelly, along the bike path, etc.), we will give you a packet of native seeds to plant in its place. The seed pods of the black swallow wort are about to burst and so time is of the essence! Here are the specifics: Identify it here Take a photo of the offending plant(s) Carefully pull it up, getting as

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Visit the Growing Center at: 

22 Vinal Ave, Somerville, MA 02143

Mailing Address: P. O. Box 76

Somervillle, MA 02143


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