Weed Free Forage and Gravel

The NAISMA Weed Free Forage and Gravel program is the only program in North America that maintains a list of standards that provide land managers assurance that noxious weeds will not be spread through the movement of forage, hay, mulch, or gravel brought in to the property. The goals of the Weed Free Forage and Gravel program are (1) to provide a guideline for the minimum requirements of certifying that forage, hay, and gravel are weed-free; and (2) to ensure uniform training and participation of the provinces and states in the program. 

The Weed Free Forage and Gravel standards are designed:

  • to provide some assurance to all participants that forage and/ or gravel certified through this program meets a minimum acceptable standard.
  • to provide continuity between the various provinces and states in the program.
  • to limit the spread of noxious weeds through forage, mulch, and gravel.

Many federal, state, and local lands require the use of certified weed free forage and gravel on their properties. Partnering agencies are welcome to include additional species and standards to their own programs. MOU holders are simply required to meet the minimum standards as described below.

How To Become a Participating Agency and Certified Inspector

1. Participating agencies must be a unit of government that regulates prohibited weeds such as a state Department of Agriculture, County Government, Crop Improvement Association that is contracted by the state, or other government entity. Download the Memorandum of Understanding below. Select Weed Free Forage or Weed Free Gravel Program or both on the MOU form. Participating agencies may participate in one or both certification programs. The authorized agency representative fills out, scans, and emails MOU to This email address is being protected from spambots. You need JavaScript enabled to view it. or mail to NAISMA, 2025 N. Lake Dr., Milwaukee, WI 53202

2. Authorized representative of MOU agency identifies inspectors who will participate in the Weed Free Forage and Gravel training and sends email addresses of inspectors to This email address is being protected from spambots. You need JavaScript enabled to view it.

3. Authorized representative of MOU agency fills out and pays Weed Free Forage and / or Gravel Program Fee ($100) here. Program fee is required annually by the end of the calendar year for current certification.

4. All inspectors of a participating agency with current MOU are required to either attend the NAISMA Weed Free Forage and Gravel training at the Annual Meeting every 3 years or take the online training. Inspectors, upon passing the inspection training quiz, will receive an inspector training certificate good for 3 years. Inspectors: click here to register for the online training. 

Participating MOU Agency or Organization: 

Register for the Weed Free Forage and / or Gravel Standards Program and pay program fee here after you have sent in your MOU (download form below).


Register and pay for the training and Inspector License Fee here. You will receive login information to take the training within 2 business days of submitting your registration.

Weed Free Forage and Gravel Program Documents are listed below. 

Weed Free Forage and / or Gravel MOU

Weed Free Forage Program Minimum Standards

Weed Free Forage Inspection Form (Intended to be used as an example for program participants to modify to meet local needs. Appendix B from Minimum Standards must be included.)

Weed Free Gravel Minimum Standards

Weed Free Gravel Pit Inspection Form

Weed Free Forage Brochure


Are you looking to purchase Certified Weed Free Forage or Gravel? 

Click on the state link(s) below to go directly to the state agency pages.

States and Provinces in Accordance with North American Weed Free Forage Standards

AL: Southern Seed Certification Assoc. 334-693-3988 or This email address is being protected from spambots. You need JavaScript enabled to view it.

AK: http://plants.alaska.gov/invasives/weed-free-forage.htm

AB: http://www1.agric.gov.ab.ca/$Department/deptdocs.nsf/All/prm1325

AZ: http://www.arizonacrop.org/NWFF&M/Grower's%20list.html

CA: http://www.cal-ipc.org/ip/prevention/weedfreeforage.php

CO: https://www.colorado.gov/pacific/agconservation/weedfreeforage

IA: http://www.iowacrop.org/Weed_Free.htm

ID: http://invasivespecies.idaho.gov/nwffs-faqs#where-can-i-buy

IN: http://www.indianacrop.org/Field-Programs/Seed-Certification

IL: http://www.ilcrop.com/

KS: https://agriculture.ks.gov/divisions-programs/plant-protect-weed-control/certified-weed-free-forage-and-mulch-program

KY: https://pss.ca.uky.edu/extension/ksia//ky-weed-seed-free-hay-and-straw-program

MI: http://www.michcrop.com/

MN:  http://www.mncia.org/pages/noxious-weed-seed-free-forage-mulch

MT: http://agr.mt.gov/agr/Programs/Weeds/NWSFF/

MO: http://www.moseed.org/weedfreeforage.htm

NC: http://www.nccrop.com/ 

NE: http://www.neweedfree.org/ForageForSale.aspx

NM: http://seedcertification.nmsu.edu/certified-weed-free-fora.html

ND: http://www.nd.gov/ndda/program-info/weed-seed-free-forage-program/certified-weed-seed-free-forage-available-sale

NV: http://agri.nv.gov/Plant/Noxious_Weeds/Programs_Weed_Free_Certification_Certified_Weed_Free_Forage/

OH: http://ohseed1.org/noxious-weed-free-forage-mulch/

OR: http://www.oregon.gov/ODA/programs/MarketAccess/MACertification/Pages/WeedFreeForage.aspx

SD: https://sdda.sd.gov/ag-services/weed-and-pest-control/weed-free-forage/

UT: http://ag.utah.gov/divs-progs/50-plants-and-pests/hay-grain-seed/170-weed-free-hay-certification.html

WA: http://agr.wa.gov/PlantsInsects/WWHAM/WWHAM.aspx

WI: http://wcia.wisc.edu/2013ForageandMulchCertificationStandards.pdf

WY: http://www.wyoweed.org/weeds/weed-free-forage


Contact Marsha Watland, WFF&G Coordinator at 218-847-9392 for more information.