Late last week, the U.S. Department of Commerce issued a preliminary affirmative ruling that Canadian mushroom producers received unfair government subsidies. As part of the ruling, the federal government announced preliminary subsidy rates ranging from 1.62% to 4.97% on fresh mushroom imports from Canada.
U.S. Case for Tariff Enforcement
“This is an important and critical first step through a rigorous investigation the U.S. [Department] of Commerce conducted,” says Mark Currie, CEO of The Giorgi Cos. “Countervailing duty actions involving Canadian industries are relatively uncommon, underscoring the significance and merit of this affirmative determination and the seriousness with which federal investigators viewed the case. And it’s only the first step.”
A separate antidumping ruling is expected later this summer.
Canadian Industry Warns of a ‘Deeply Flawed’ Precedent
However, the Canadian mushroom industry says that the Department of Commerce’s ruling sets a dangerous precedent using a standard tax treatment that both the U.S. and Canadian governments use as the basis of the antidumping claim.
Ryan Koeslag, executive vice president and CEO of Mushrooms Canada, called the preliminary conclusion “deeply flawed” in a news release.
“The overwhelming basis for the preliminary countervailing duty rate appears to be mainstream agricultural tax treatment, including provincial sales tax exemptions available to farmers generally,” Koeslag says in a statement. “Treating broad-based agricultural tax measures as unfair subsidies is contrary to common sense and unfairly penalizes Canadian mushroom growers for participating in programs available across the agricultural sector in any number of countries.”
Lewis Macleod, CEO of South Mill Champs, says the company, which has mushroom farms in both Canada and the U.S., has reached out to other U.S. produce sectors to share the potential implications of this legal precedent on other industries.
“What this ruling essentially says is that if a produce or agricultural grower buys new equipment in the year and gets a sales tax exemption, essentially, they’re opening themselves up to a successful countervailing petition from a U.S. grower,” Macleod says. “And for doing nothing more than receiving the same support which the U.S. producers benefit from.”
Currie says the case is about Canadian growers “selling mushrooms in the U.S. below actual cost of production.”
“The dangerous precedent we should all be concerned about is American farmers being undercut by private equity and unfair business practices that put American mushroom farmers out of business and further shrink a domestic supply,” Currie says.
Beyond Tariffs: The Dispute Over Farm Accounting Practices
Macleod says the Department of Commerce has also opened a new inquiry targeting mushrooms’ cash-basis taxation in Canada, which is another common tax treatment.
“The inquiry flies in the face of the long-held policy positions of U.S. farming interests that do not view cash basis taxation as some form of subsidy, but merely a method of taxation to address conditions unique to farming,” South Mill Champs says in a letter to specialty crop commodity groups. “If farmers are pushed into accrual-based taxation, they could owe taxes on crops or livestock not yet sold, creating serious, potentially existential, liquidity problems.”
Supply Chain Impacts and the Cost of Defense
Koeslag says that the countervailing duties and the pending antidumping duties likely won’t impact Canadian mushroom exports to the U.S. While Canadian growers will likely see these tariffs as frustrating, it’s not enough to disrupt mushroom sales into the U.S.
“We’re still going to see Canadian mushrooms flow south into the United States, not only because of the quality, but I think it will still be price-competitive in comparison to what they have in the states,” he says.
Macleod notes, “At this level of margin, I think the broader issue from our perspective is the frustrations that we’re now being caught in a process that just adds an awful lot of ongoing cost, with zero benefit to product quality, or for the mushroom industry as a whole,” adding, “Regardless, it’s not going to fundamentally change the supply picture as there is a demand for good mushrooms grown in new infrastructure providing better quality to consumers.”
Currie says The Giorgi Cos. has led an industrywide effort to invest dollars into marketing to the next generation of mushroom consumers.
“The future depends in part on a fair playing field in which Canadian producers are not unfairly subsidized or dumping below production costs,” he says.
A common counter-argument from Canadian producers is that this trade dispute isn’t actually about unfair subsidies but rather that the Canadian mushroom industry has aggressively invested in highly automated, modern, climate-controlled facilities, while many domestic U.S. farms have been slow to move away from older, labor-intensive production systems.
“Close if not 100% of the mushrooms exported from Canada are grown on new infrastructure. This compares with approximately only 25% of U.S. mushroom production,” Macleod says. “We have both new and old infrastructure and know firsthand the difference in quality — a difference that U.S. customers also recognize and show through their buying decisions.”
Currie refutes that claim, saying, “The issue isn’t the type of operations. The argument isn’t about infrastructure. The issue is Canada is dumping mushrooms and unfairly disrupting the marketplace.
“The U.S. mushroom industry continues investing in operations, technology, growing practices and people to meet customer demand and strengthen domestic production. Innovation in American mushroom production takes many forms, including advanced infrastructure, operational investment and generations of growing expertise,” Currie continues.
Mushrooms Canada has already invested more than $1 million to defend this suit, and Koeslag says the mandatory respondents in the case will likely pay double or triple that amount to defend the suit; this comes at a time when the industry has already struggled with increasing consumption.
“All of our farmers are having to contribute to that right now,” Koeslag says of the legal fees. “It’s unfortunate. We should be focusing on how to market these healthy mushrooms during an inflationary issue, maybe go back to the blend and extend and other ways to try and make every person’s grocery bill go further.”
Macleod says these countervailing duties will set a harmful precedent, hurt the North American mushroom industry and consumers.
“Our view is that all players in the industry should be coming together to promote the benefits of mushrooms and grow the market, rather than undertaking costly and distracting actions like these, which only serve to add costs and increase prices — neither of which are good for customers,” he says.
Koeslag says the association will continue to fight the claims and can still make arguments about this announced countervailing rate as it applies to agricultural tax exemptions.
Legal Timeline
A preliminary antidumping rate will likely be announced this summer, a timeline that Koeslag says could easily see extensions.
“We’ll still have more arguments,” he says. “There’ll still be more data collected, but it will be preliminarily set as they start collecting the tariffs from the countervail and the antidumping duties likely in August. That’s all in holding until the final determination is made.”
The Department of Commerce officially extended its deadline for the preliminary less-than-fair-value (antidumping) determination to July 13, pushing the broader tariff rollout into late summer.
Then, Koeslag says, following the preliminary rates, there will be additional investigations throughout 2026 by the U.S. International Trade Commission into whether or not Canadian mushroom growers have caused material harm to the U.S. fresh mushroom industry.
“What could happen, like the other tariffs that were placed earlier in 2025, they could be returned after finding all the information that there really has been no material damage caused whatsoever,” he says. “That will be our hope, and that will be what we think that they should find with the data that’s coming out of the mandatory respondents and the general information that we provided. It’s still ongoing, and we’re not going to see the end of this for likely, still some time.”
Macleod agrees, noting, “We know the ITC process needs to play out to where we’re confident that it’ll demonstrate that there’s no harm to the U.S. industry. We’ve done nothing wrong and abide by fair trade practices.”
