Michigan: invasive mile-a-minute weed found in Calhoun County

The Michigan departments of Natural Resources and Agriculture and Rural Development recently confirmed the presence of invasive mile-a-minute weed(Persicaria perfoliata) at Albion College’s Whitehouse Nature Center in Calhoun County.
What is mile-a-minute weed?Mile-a-minute weed is an annual vine that gets its name from its ability to grow up to 6 inches per day, or 25 feet in six to eight weeks. Its light green leaves are shaped like equilateral triangles, and both the stems and leaf blades are lined with small, recurved barbs that help it climb over other vegetationWhy is it a problem?The vine’s fast growth and climbing habit allow it to overtake native and landscape vegetation, eventually smothering plants and trees under dense, prickly thickets. Because of the risk to Michigan’s Christmas tree farms, reforestation projects and habitat restoration areas and the plant’s limited distribution, mile-a-minute weed is on the state’s invasive species watch list.How did mile-a-minute weed get here? Read more





