*** Alert: Ventenata In Yellowstone County ***


Ventenata has been found in Yellowstone County. Ventenata is an invasive winter annual grass that is showing up in native rangeland pastures and along right-of-ways.



"The Mission of the Yellowstone County Weed Department is to assist the public, private, and other government agencies to manage and control existing noxious weed infestations as well as to prevent new invasive species from infesting Yellowstone County. Using integrated weed management approaches; educational, biological, chemical, cultural and mechanical methods, this “Mission” can be accomplished."



Seasonal Weed Techs

Yellowstone County only hires Seasonal Weed Techs that are commercially licensed applicators through the Montana Department of Agriculture. In order to obtain this license our seasonal weed techs have to study and pass the National Pesticide Applicator Certification Core Exam as well as the Montana Department of Agriculture Right-of-Way and regulatory Weed Exam. Every Seasonal Weed Tech is required to pass these two exams to receive their license.



News - Fall 2014

Weed Trucks

Puncturevine Management

Puncturevine (Tribulus terrestris L) is also known as goatheads, bullheads, Texas sandbur or Texas tacks. Puncturevine is native to warm temperate and tropical regions of southern Europe, Asia, throughout Africa and in northern Australia. A member of the Caltrop Family, it is a tap rooted herbaceous perennial plant that grows as a summer annual in colder climates. It can also thrive in desert climates and poor soil conditions. Find out more here (pdf).


The warm weather is here, so is the growth of noxious weeds.  To help with any problems that you may encounter, the Yellowstone County Weed District has four (4) programs to choose from that could be useful to you. 

A Herbicide Cost Share Program has been implemented. This program is designed to help off-set the cost of controlling noxious weeds on property in Yellowstone County. To be a participant, the landowner must apply and meet certain criteria. It is a 100% herbicide cost share, based on a first come, first serve basis, with a $1000 cap. 

The Weed District has a spray rental program.The equipment ranges in size depending on your needs. Backpack, free of charge, ATV and slide in models are $10 a day or $25 for a weekend. A grass spreader for re-vegetation is also available.

The District has education specialists with workshops available for small groups; such as a homeowners associations, realtors, civic organizations or classrooms.

Together we can fight noxious weeds and save the environment. The Weed District is here to assist you with information, equipment, and a cost-share program, and then you can help us by bringing in your empty – triple rinsed herbicide jugs for our recycling program

Anyone interested in further details for any of these programs, should stop by the office at 3319 King Avenue East or call the Weed District at  406-256-2708. We are open Monday- Thursday 7:00 AM – 5:30 PM.