This summer DCIST, the Ridges, Master Gardeners, and a handful of dedicated private citizens took on several prohibited species identified in Door County. Prohibited species are those rarely found in Wisconsin, with the exception of small pioneer populations that are isolated, but which, if introduced into the state, are likely to survive and spread, potentially causing significant environmental or economic harm or harm to human health. Under NR 40 individuals cannot transport, possess, transfer, or introduce prohibited species without a permit. DCIST along with these private citizens and organizations, made efforts to control porcelain berry, black swallow-wort, and 5-leaf akebia vine.
All three of these species are vines. Each were introduced as ornamental plants and managed to spread from beyond the garden bed into the native landscape. They colonized and degraded natural areas which resulted in them being categorized as invasive species. This story is not uncommon and highlights the importance of planting and utilizing native species when landscaping.
For more information about this story check out our September 2020 newsletter.
