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Weeds, Pests & Diseases

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Contact Info

The Forestry Division inspects trees for infectious diseases and insects, and responds to tall grass and weed complaints. 

Vegetation Management & Enforcement 
The current City Ordinance regarding Vegetation Management & Enforcement can be found here (PDF). To report a weed issue, please call 763-509-5958.

Dutch Elm Disease
If an elm tree on your property is identified as infected with Dutch elm disease, it will be clearly marked and numbered with orange paint. You will be sent a Dutch elm disease notification letter (PDF) that includes removal and disposal options.  You will have 30 days to correct the nuisance.

Noxious Weeds & Tall Grass
If tall grass – exceeding eight inches tall – and/or noxious weeds are identified on your property, you will receive a weed eradication notification letter (PDF). You will have 10 days to correct the nuisance.

Emerald Ash Borer
The emerald ash borer (EAB) is a non-native insect that destroys ash trees. This invasive species was accidentally brought to the United States from Asia in the 1990s. It was first discovered in Michigan in 2002. Since then it has been found in several states. It has now been discovered in Minnesota.

Invasive Non-Native Pests
Expanding globalization introduces non-native plant and insect pests that threaten our native environments. These pests:

  • Out-compete native plants for nutrients, light and moisture
  • Form an impenetrable layer of vegetation
  • Degrade wildlife habitat
  • Threaten the future of forests, wetlands, prairies and other natural habitats
  • Lack natural controls like insects or disease that would curb their growth

Find information on invasive terrestrial plants at Minnesota Department of Natural Resources Invasive Terrestrial Plants.

Weed Wrench Loan Program
The Forestry Division loans out weed wrenches to Plymouth residents who want to eradicate buckthorn or other invasive, woody plants. Please call 763-509-5940 to reserve your wrench.


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