Giant hogweed (Heracleum mantegazzianum) has recently been discovered in Sheboygan County. Early detection of this Wisconsin Prohibited Species has resulted in rapid control with the vital help of the Wisconsin Department of Natural Resources (WDNR) and local homeowners.
Don’t confuse our native American cow parsnip (Heracleum lanatum) and other similar plants with giant hogweed . Use on-line resources, printed materials and great educational videos to differentiate between the species, carefully examine the plant and if you are still unsure, send photos to the WDNR. If you believe you have giant hogweed growing in your area, contact the Wisconsin Department of Natural Resources. And, if you happen across a patch of American cow parsnip, stop and appreciate the beauty of this massive native perennial (from a safe distance!).