Canadian Mushroom Tariffs May Help U.S. Producers
August 26, 2026 
Assortment of mushrooms from Fungaia Farms. | Photo: ERI
A recent report from the RFD Network states that U.S. domestic mushroom growers could receive pricing support against competitors due to preliminary antidumping duties imposed on Canadian imports of fresh mushrooms on July 14, 2026. According to the International Trade Administration, as part of the U.S. Department of Commerce, the preliminary antidumping tariff is now set at 8.26% for most fresh mushroom imports, although specific company rates range from 2% to 11.80%.
Additionally, in May 2026, a 2.84% countervailing duty was set by the U.S. to address alleged “unfair government subsidies” provided to Canadian producers, according to CBC. However, many officials involved in Canadian mushroom production have denied the insinuation of unfair trade practices or special government treatment, including Mushrooms Canada CEO Ryan Koeslag.
New Mushroom Tariffs Likely to Help Producers While Hurting Consumers
Program Manager Landyn Young at the Texas A&M Center of North American Studies says these tariffs against Canada could help domestic mushroom producers better compete against growing import volumes.
In 2025, Canada supplied an estimated 74,200 metric tons of fresh mushrooms to the U.S., valued at $345 million. These imports also accounted for up to 23% of fresh mushroom availability in the country (up from 16.8% in 2019).
Young estimates that 81% of fresh mushroom imports could face the aforementioned antidumping tariffs, including 92% of imported Agaricus mushrooms. Domestic production of Agaricus mushrooms is concentrated in California and Pennsylvania, accounting for 69% of the U.S. supply in 2025.
However, while higher import costs may improve the competitiveness of U.S. mushroom growers, it may come at the expense of increasing costs for grocery shoppers and restaurants.