08/02/2026
NEW: "Mile-A-Minute" W**d confirmed in Jackson County, Michigan. Just this past week, officials confirmed a new population of the highly invasive mile-a-minute w**d in Concord Township. This marks the latest spread of one of Michigan's fastest-growing invasive plants.
This aggressive vine can grow up to 6 inches per day, which means it can reach an astounding 25 FEET in just 6 to 8 weeks. The vine climbs over trees, shrubs, and native vegetation, forming dense, thorny mats that can smother the native ecosystems.
The plant was first discovered in Michigan in 2020 near Albion in Calhoun County. The newly confirmed Jackson County infestation is just 4 miles from the original detection and less than 2 miles from another known infestation, suggesting the vine is slowly expanding its range.
WHAT TO LOOK FOR:
• Triangle-shaped light green leaves
• Small backward-facing thorns on stems and leaves
• Distinctive bright blue berries in late summer
Early detection is critical. This map below marks the two counties in Michigan, Calhoun & Jackson that have confirmed Mile-A-Minute detections. Officials have now surveyed over 5,600 acres in these two counties. No additional infestations have been found in Jackson county. Mile-a-minute w**d thrives in full sun and wet soils, but it can grow in a variety of conditions. Like many invasive plants, it takes advantage of open space and disturbed areas including roadsides, stream banks, forest edges and fence lines. If you believe you've found mile-a-minute w**d, report it through the Midwest Invasive Species Information Network (MISIN) to help monitor, track and slow its spread across Michigan.