Minnesota’s Department of Agriculture publishes a list of invasive, non-native plants that are harmful “to human or animal health, the environment, public road, crops, livestock or other property” (Minnesota Department of Agriculture). These plants are called noxious weeds. There are three lists of noxious weeds: Eradicate, Control, and Restricted. Each list is updated annually. The current list of noxious weeds can be found at this link.
There currently are not any reports of noxious weeds on Minnesota’s eradicate list in Aitkin County; however, meadow knapweed has been reported along the southeastern border, in Pine County.
The Minnesota Department of Agriculture publishes a map with reports of any species on the Eradicate list, found at this link.
There are 10 species of noxious weeds on the Control list in Aitkin County.
- Bohemian knotweed
- Canada thistle
- Common tansy
- Giant knotweed
- Japanese knotweed
- Non-native phragmites
- Plumeless thistle
- Purple loosestrife
- Spotted knapweed
- Wild parsnip
There are 5 species of noxious weeds on the Restricted list in Aitkin County.
- Black locust
- Common buckthorn (European buckthorn)
- Garlic mustard
- Glossy buckthorn
- Siberian peashrub
These maps are current as of March 2022. These maps consist of just the verified reports of invasives uploaded to EDDMapS; many invasives are far more widespread than these maps show. Common tansy, common buckthorn, glossy buckthorn, Canada thistle, and spotted knapweed are very common throughout Aitkin County. The Aitkin SWCD is working on updating and further tracking terrestrial invasive species.