%{{tag.tag}} {{articledata.title}} {{moment(articledata.cdate)}} @{{articledata.company.replace(" ","")}} comment U.S. President Donald Trump is threatening to impose "severe tariffs" on imports of Canadian fertilizer. Speaking at the White House, Trump suggested that he could target fertilizer imported from Canada to boost domestic agriculture production in the U.S. Tariffs on fertilizer sourced from outside the U.S. could renew concerns from American farmers who are grappling with rising input costs. Canada is the U.S.'s biggest supplier of potash, the main ingredient in fertilizer, and commodities analysts say American farmers have few alternatives to source the product they need to grow their crops. Trump made the comments as he announced a $12 billion U.S. aid package for U.S. farmers who have been hit hard by the president's import tariffs. Still, tariffs could hurt the fertilizer industry in Canada. The Canadian province of Saskatchewan produces about one-third of the world's potash supply, shipping much of it to the U.S. According to Government of Canada data, 46% of potash exported from Canada in 2023 was sent to America. Canada's main competitors in potash production are Belarus and Russia. Nutrien (NYSE: $NTR ) is the largest potash producing company in Canada. Based in Saskatoon, its stock is up nearly 30% this year and currently trading at $83.98 per share. Other leading potash companies include Western Resources (TSX: $WRX ) and Mosaic Co. (NYSE: $MOS ).