The United States has moved to impose countervailing duties on fresh mushrooms imported from Canada after a preliminary investigation by the U.S. Department of Commerce concluded that Canadian producers benefited from unfair government subsidies. The decision marks the latest escalation in trade tensions between the two countries and has drawn strong criticism from Canada’s mushroom industry.
According to a notice published Monday in the U.S. Federal Register, most Canadian fresh mushroom exports will now face a countervailing duty of 2.84 per cent. However, two Canadian companies were assigned separate rates based on the investigation’s findings. Champ’s Fresh Farms Inc. received a duty rate of 1.62 per cent, while Farmers’ Fresh Mushrooms Inc. was hit with a higher rate of 4.97 per cent.
Additional anti-dumping duties are expected to be announced later this month, potentially increasing the financial burden on Canadian exporters.
The investigation began in January after the U.S.-based Fresh Mushrooms Fair Trade Coalition filed a complaint alleging that Canadian mushroom growers were receiving unfair subsidies through agricultural tax exemptions and other government measures. The coalition argued that Canadian imports had steadily increased in the U.S. market despite stagnant domestic mushroom consumption, putting pressure on American producers.
Canadian industry leaders have rejected the allegations. Ryan Koeslag, CEO of Mushrooms Canada, described the Commerce Department’s findings as “deeply flawed” and argued that the programs cited in the investigation are common agricultural tax policies available broadly across the farming sector.
Koeslag said treating standard provincial tax exemptions as unfair subsidies unfairly targets Canadian growers for participating in programs that are similar to those available to agricultural producers in many countries, including the United States itself.
“Mushroom growers in Canada are not receiving special treatment,” Koeslag said in a statement. “These are mainstream agricultural measures that support farmers generally and should not be considered trade-distorting subsidies.”
He also noted that under U.S. trade law, a subsidy must meet specific legal conditions before duties can be applied, adding that Mushrooms Canada does not believe those standards have been met in this case.
On the American side, mushroom producers welcomed the ruling. Giorgio Mushroom Co., a member of the Fresh Mushrooms Fair Trade Coalition, called the duties a significant victory for U.S. growers.
“For years, American mushroom growers have faced enormous pressure from unfairly subsidized imports,” said Giorgio Mushroom CEO Mark Currie. “This action is an important step toward restoring fair competition in the market.”
Trade experts say the current duties are relatively modest but could increase depending on the final outcome of the investigation and any anti-dumping penalties imposed later.
William Pellerin, an international trade lawyer with McMillan LLP, said the case highlights how trade investigations often focus only on foreign subsidy programs without examining comparable support offered domestically in the United States.
He added that while the duties are not directly tied to President Donald Trump’s broader tariff policies, the administration’s aggressive trade approach could encourage more U.S. agricultural industries to seek similar investigations against foreign competitors.
The mushroom dispute also echoes ongoing Canada-U.S. trade battles over products such as softwood lumber, where countervailing and anti-dumping duties have been a recurring issue for years.
Canada’s mushroom industry is expected to challenge the duties through dispute-resolution mechanisms available under the Canada-United States-Mexico Agreement (CUSMA), arguing that the investigation and resulting tariffs violate international trade rules.
As tensions continue to rise, industry observers warn that similar trade complaints could spread across North America’s agricultural sector, creating new challenges for farmers and exporters on both sides of the border.
