Minnesota Noxious Weed Law Landowner Duty

Minn. Stat. §18.78, subdivision 1 puts the noxious-weed duty on three groups at once: the person who owns the land, the person who occupies it, and whoever maintains public land. Each must manage noxious weeds according to the category assigned under §18.771, at whatever time and in whatever manner a county agricultural inspector or county-designated employee orders. There's no single statewide deadline; compliance timing is set order by order, tied to when each species needs treatment.

Section 18.771 sorts weeds into five categories. Prohibited-eradicate species, not yet established statewide, must be eradicated everywhere in Minnesota and can't be transported, sold, or propagated. Prohibited-control species, already established, must at minimum be kept from spreading by seed or root; they also can't be sold or propagated. Restricted species can't be imported, sold, or transported without a permit under §18.82. Specially regulated plants get individual management plans from the commissioner of agriculture, and county boards can add their own county noxious weeds list once the commissioner approves it. Purple loosestrife and nonnative Phragmites get their own regime under §18.78, subd. 2: the DNR controls them on designated public waters below the ordinary high-water mark unless a landowner files a written statement assuming that responsibility.

Enforcement starts with notice under §18.83. A general notice for control or eradication must be published by May 15 each year; when the county needs faster or more specific action against one owner, the inspector serves an individual notice by certified mail or the same method used for a civil summons. A recipient has two working days to appeal in writing to the county's appeal committee, a county commissioner or municipal official plus a resident landowner, which must inspect the land and rule within five working days. If an owner ignores the notice, the inspector hires someone to do the work, bills the county, and the county puts unpaid costs on the property's tax roll to be collected like any other real estate tax.

Section 18.86 bars obstructing an inspector, mishandling weed-infested equipment or material, selling infested material without a transport or screenings permit, or simply ignoring a notice to control weeds, and §18.87 makes any of that a misdemeanor, though inspectors and their assistants can't be penalized for failing to perform their own official duties.

Ignoring a valid weed notice, obstructing an inspector, or selling weed-infested material without the required permit is a misdemeanor under §18.87. The bigger financial hit comes from the abatement bill instead: under §18.83, subd. 6-7, the inspector hires a contractor to do the work the owner skipped, the county pays first, then certifies the cost onto the county auditor's tax roll, where it's collected and enforced exactly like a real-estate tax.