Invasive 'mile-a-minute' weed found in Maine poses severe threat, officials say

AUGUSTA, Maine - The Department of Agriculture Conservation and Forestry recently verified the first known occurrence of "mile-a-minute" weed - also known as Persicaria perfoliata - in Maine.

The fast-growing invasive vine, native to India, Asia, and the Philippine Islands, poses a significant threat to nurseries, Christmas tree farms, reforestation projects, and restoration areas, as it can smother young plants and trees under its dense growth.

Mile-a-minute weed derives its name from its astonishing growth rate of up to 6 inches per day or 25 feet in six to eight weeks, according to a press release from the state's he Department of Agriculture Conservation and Forestry. It features distinctive triangular leaves, spikes of pea-sized blue fruits, and recurved barbs along the stems and leaf margins. The vine also displays peculiar circular leaves, known as ocreae, clasping the stem beneath each fruit spike.

Invasive species like mile-a-minute weed have the potential to cause severe harm to Maine's environment and economy. As part of our commitment to controlling and eradicating this invasive plant, the DACF urges the public to report any potential sightings promptly. If you encounter a vine resembling mile-a-minute weed, please call 207.287-7545.

"The timely reporting of invasive plants is crucial to our efforts in safeguarding Maine's natural areas," said State Horticulturalist Gary Fish. "With the public's support, we can respond rapidly and take necessary measures to eradicate any other mile-a-minute weed plants in the area."