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Aquatic weed control & aquatic weed harvesting for lakes and ponds.

Aquatic Plants are an essential part of lake communities and benefit a wide variety of organisms, including you. Although aquatic plants are sometimes a nuisance for lakeshore property owners, it is important to remember that they are critical for a healthy lake environment. Here are some reasons why.

Aquatic Plants:

Help prevent shoreline erosion by breaking up wave action
  • Provide natural food and shelter for fish and wildlife
  • Are one of the first links in the aquatic food chain
  • Improve water clarity and quality

The Nuisance Factor

The Minnesota Department of Natural Resources (DNR) recognizes that aquatic plants, algae, snails, and other aquatic life are sometimes a nuisance. Nuisance aquatic plants can be addressed through the department's Aquatic Plan Management Program. This program issues permits for controlling or destroying aquatic plants or invertebrates in public waters. One goal of the program is to ensure that methods used to manage nuisance conditions will be effective without harming beneficial aquatic plants and the environment.


Before removing or treating aquatic vegetation or organisms in the lake, be sure you understand the rules and regulations for these activities. If you have questions about aquatic plant control contact your nearest DNR office. Violations of Minnesota (or other state's) laws pertaining to aquatic plant removal may result in civil or criminal penalties.

Different Aquatic Plants

The amount of control allowed often depends on the kind of plant growing in the area. Aquatic plants are categorized as follows:

Submerged plants have stems and leaves that grow entirely under water, through some may also have floating leaves. Pondweeds and coontail are well-know examples.

Floating-leaf plants
are rooted in the lake bottom, but their leaves and flowers float on the surface of the water. Water lilies are well-known examples.

Emergent plants are rooted in the lake bottom, but their leaves and stems extend out of the water. Cattails and bulrush are well-known examples.

Algae have no true roots, stems, or leaves and range in size from tiny one-celled organisms to large, multi-celled plant-like organisms, such as chara. Many algae are free floating and, when present in large numbers, can make the water appear green.

Two common types of Watermilfoil

Northern Watermilfoil
Eurasian Watermilfoil


Some Friendly Advice

This Web page is a reference guide for you. It is not a complete list of the aquatic plant management regulations. Please note: Rules and regulations do change and for the most up-to-date information contact your local DNR or fisheries office. We CANNOT be held responsible if you are not aware of your local regulations.

DNR Fisheries Offices:

- Bemidji • 218-755-3959
- Glenwood • 320-634-4573
- Brainerd • 218-828-2735
- Grand Rapids • 218-327-4414
- New Ulm • 507-359-6088
- Little Falls • 320-616-2450 ext 235
- St. Paul • 651-772-7956

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