Wisconsin plans 65 invasive listings, Michigan weighs five

Wisconsin’s revised invasive-species rule takes effect Jan. 1, 2027, adding 65 regulated species, removing 22 and changing the classification of 46. The state retains prohibited and restricted categories: prohibited species are not yet widespread and may not be possessed, transported, transferred or introduced, while restricted species may not be transported, transferred or introduced. Michigan officials are considering restrictions on five invasive plants: creeping water-primrose, large-flowered water-primrose, round-leaved bittersweet, lesser celandine and common butterbur. The water-primroses are proposed as prohibited because they are not widely established; the other three would be restricted. The recommendations are scheduled for consideration by Michigan agriculture officials, with a 30-day public comment period possible if they advance, and will also be discussed by the state’s Natural Resources Commission.