Serving Montana Agriculture and growing prosperity under the Big Sky

Noxious Weeds

Noxious weeds have a destructive impact on Montana's landscape by displacing native plant species, increasing soil erosion, and decreasing wildlife habitat and recreational opportunities. Rangeland, pastureland, cropland, forests, and wildlands cover 92 million acres, 98% of the total land area, in Montana. These lands are vital for agricultural production and protecting the integrity of ecosystems.

The Department's Noxious Weed Programs offer resources and assistance with the management of state- and county-listed noxious weeds.

Prevent Weed Spread from Hay Factsheet 2021
Click here for full document

As Montana agricultural producers strive to find adequate feed for livestock during severe drought conditions and a damaging wildfire season, the Montana Department of Agriculture encourages producers to follow guidance and utilize available resources for out-of-state shipments of hay to prevent the spread of noxious weeds and other invasive pests.

The MDA Noxious Weed Program is available to assist producers in their decision to use hay from out of state. Please contact Jasmine Chaffee, 406-444-3140, for more information.



  • Petition cycle open for new weeds to list on MT Noxious Weed List

Statewide Noxious Weed Coordination

The State Noxious Weed Coordinator submits regular Noxious Weed Coordination Reports to the Montana Environmental Quality Council (EQC). Recent reports are available to download below.

Noxious Weeds News


Jasmine Chaffee
State Weed Coordinator
Phone: (406) 444-3140

Andrew Lam
Noxious Weed Free Materials Coordinator

Phone: (406) 444-7819

Greta Dige
NWTF Grant Coordinator
Phone: (406) 444-7882

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