Certified weed-free compost is a safe and effective way to enrich soil without risking the spread of invasive plants. It meets public and private standards for restoration, agriculture, and landscaping projects—supporting compliance with agency regulations, grants, and environmental contracts. By eliminating weed seeds and propagules, it protects gardens, croplands, and wildlands, reduces long-term maintenance costs, and helps preserve native ecosystems. Trusted by professionals, it’s the reliable choice for sustainable soil improvement.
Certified compost is inspected to ensure it’s free* from seeds and propagative parts of listed noxious weeds, reducing the risk of spreading invasive species.
Promotes healthy, weed-free soil while supporting native vegetation, especially in sensitive habitats or restoration sites.
Ideal for conservation projects, native landscaping, reclamation, agriculture, and fire rehabilitation where clean inputs are essential.
Minimizes future costs and labor associated with managing invasive weed outbreaks caused by contaminated organic material.
Complies with increasing demands from federal, state, and local agencies for certified weed-free inputs in public land and conservation projects.
Signals commitment to sustainability and invasive species prevention—important for contractors, agencies, landowners, and funding sources.
Clean compost helps ensure that seeding, planting, and soil improvement efforts are not undermined by weed infestations.
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.