US delays dumping probe preliminary ruling on Canadian mushrooms
The U.S. Department of Commerce announced a postponement of the preliminary determination in its less-than-fair-value (LTFV) investigation into fresh mushrooms imported from Canada, extending the timeline for the investigation. This delay affects Canadian mushroom exporters and U.S. importers sourcing from that country. The postponement allows Commerce additional time to review data and evidence before issuing its initial findings on whether Canadian mushrooms are being sold at less than fair value.
Photo: Eyes2Soul Eyes2Soul / PexelsUS delays dumping probe preliminary ruling on Canadian mushrooms
The U.S. Department of Commerce postponed the preliminary determination in its less-than-fair-value investigation into fresh mushrooms from Canada, according to a notice published in the Federal Register on May 4, 2026. The postponement extends the timeline that importers and exporters must plan around while the investigation proceeds.
Less-than-fair-value (LTFV) investigations examine whether imported goods are being sold at prices below fair value, which can trigger anti-dumping duties. The investigation into Canadian fresh mushrooms will continue, but Commerce requires additional time to examine questionnaire responses and other evidence before reaching preliminary conclusions.
Who's affected
Canadian mushroom producers and exporters face an extended investigation period that could ultimately result in preliminary anti-dumping duty margins. U.S. importers of fresh mushrooms from Canada—including distributors, retailers, and foodservice operators—must plan for potential duty exposure on incoming shipments, though the timing of any preliminary determination has now shifted.
HS Chapter 07 (Edible vegetables and certain roots and tubers) covers fresh mushrooms. The investigation specifically targets fresh mushroom imports from Canada, which is a major supplier to the U.S. market.
Investigation timeline
The postponement adjusts the schedule for Commerce's preliminary determination, giving the agency more time to process data submissions and prepare its initial findings. A final determination will follow the preliminary phase once Commerce completes its analysis.
What this means for shippers
Canadian mushroom exporters and their U.S. customers must monitor Commerce's revised timeline closely. Until a preliminary determination is issued, tariff exposure remains uncertain—prepare duty estimates based on potential anti-dumping margins once Commerce announces its preliminary findings. Check the Federal Register regularly for the new preliminary determination date, and document your cost of goods and pricing practices now to support any appeals if duties are imposed. Review /hs-codes/search to confirm your mushroom classification and ensure compliance classification before shipment.
