The Community-Driven Effort to Control Garlic Mustard

DRC After Hours Sponsor: Melissa Fuhrmann

Garlic mustard, known for its distinctive garlic scent when its leaves are crushed, poses a serious risk to native plant species. Its proliferative seed production and ability to remain viable in the soil for extended periods allow it to dominate forest floors, stifling the growth of indigenous plants. Decorah resident Mary Lewis has led community efforts over the past 25 years to help control the spread of this invasive species. She will speak to the Rotary After Hours group to teach our members how to recognize garlic mustard, how to enjoy it in a stir-fry, and above all how to help keep it out of our parks.

Mary first saw garlic mustard in the in the early 2000’s when she discovered the overwintering plants while jogging in Palisades Park. In the spring she joined with Larry Berland’s high school class as they attacked a big patch on a steep slope, and after that started weeding on her own. She drew others into the effort, by leading groups into the parks to weed and learn about this persistent plant, whose seeds can last in the ground for years before sprouting. The threat to our forests is that it takes over the woodland floor, creating a monoculture where nothing else can grow, including spring flowers and seedling trees. The work that many have done, including hard working park department employees and Friends of Decorah Parks led for years by Ellen MacDonald, has made a huge difference, but it’s a fight that will need to continue to keep it from spreading. Mary seeks to increase the numbers of people involved and have Decorah Park & Rec take on a bigger role.

Mary taught in the biology department at Luther College for nearly 20 years. Before that she co-founded Badgersett Research Farm for the development of hazels as a perennial crop.

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