Prevent the spread of invasive weeds along roads, trails, waterways, and project sites with certified gravel. It meets strict environmental standards required by local, state, federal, and provincial agencies—saving time and long-term costs while protecting sensitive landscapes.
Reduces the risk of introducing noxious or invasive plant species to natural areas, roadsides, trails, construction sites, and restoration projects.
Helps preserve the ecological balance by preventing non-native species from outcompeting native plants.
Meets agency, project, and landowner requirements for invasive species prevention (especially on federal, state, and tribal lands).
Prevents costly weed infestations that require ongoing management, herbicide use, and site remediation.
Shows commitment to sustainable and responsible land use practices, which is increasingly valued by funders, agencies, and the public.
Meets specifications for many public and private land projects that require certified weed-free materials.
Gives suppliers, haulers, and contractors a competitive edge by offering materials that meet rigorous inspection and certification standards.
All materials must meet handling, storage, and site cleanliness standards to be eligible.
Connect with your state/province’s
certifying authority to get started.
Find a Program Partner
Contact your state/provincial program partner to schedule a field inspection prior to harvest.
A certified inspector surveys the production area for any listed weed species.
If standards are met, the inspector provides a certificate and official Weed Free Product tags or twine, if applicable.
Use certified labels to sell or transport your forage as “Weed Free Certified” across jurisdictions.
NAISMA’s Weed Free Products Program certifies materials as compliant with standards designed to reduce the spread of prohibited weeds. “Free” refers to compliance with inspection standards; absolute absence of invasive species is not guaranteed.
