U.S. corn farmers are facing escalating input costs in March 2026 as the Middle East conflict disrupts global fertilizer and fuel markets, a development that matters because it directly threatens farm profitability, planting decisions, and overall agricultural supply chain stability.

Leaders from the National Corn Growers Association warn that the ongoing geopolitical tensions-particularly the blockage of the Strait of Hormuz-are tightening supplies of key fertilizers and energy inputs. This critical shipping route connects major producers of oil, natural gas, and fertilizers to global markets, and its disruption is sending price signals across the agricultural economy.

Fertilizer markets are under acute pressure, with phosphate and nitrogen supplies constrained by both geopolitical factors and existing U.S. trade policies. American farmers rely heavily on imports, with roughly 40% of phosphate products typically sourced from Saudi Arabia. When those flows are interrupted, availability declines and prices rise sharply.

Compounding the issue, countervailing duties on phosphate imports from Morocco and Russia-implemented in 2020-continue to limit supply options, according to industry groups. A study from Texas A&M University estimates these duties increased phosphorus costs by approximately $6.9 billion between 2021 and 2025, highlighting the long-term financial burden on producers.

As a result, major agricultural organizations-including state and national corn and soybean groups-are intensifying pressure on policymakers and fertilizer companies to revisit these trade restrictions. They argue that reducing barriers could improve supply chain flexibility and lower input costs at a critical time.

At the farm level, the financial strain is becoming more severe. Corn producers are entering what could be a fourth consecutive year of negative margins, driven by persistently low commodity prices and rising input costs. The U.S. Department of Agriculture estimates corn production costs will climb to $917 per acre in 2026, up from roughly $890 per acre in 2025.

Nitrogen fertilizer, a cornerstone input for corn production, remains particularly sensitive to global market shifts. Farmers report that current import prices could increase production costs by as much as $90 per acre, significantly affecting profitability and risk management strategies, including crop insurance decisions.

Fuel prices are also climbing as a direct consequence of the conflict. Higher energy costs are compounding the pressure on farm operations, from fieldwork to transportation across the agricultural supply chain. In response, growers are renewing calls for expanded access to E-15, a higher ethanol blend that could reduce fuel costs by 10 to 30 cents per gallon.

Despite bipartisan support and backing from the Trump administration, legislation to allow year-round nationwide sales of E-15 has yet to pass. Agricultural groups are urging both Congress and the Environmental Protection Agency to act quickly, including issuing seasonal waivers to expand availability during peak demand periods.

Supply chain disruptions are further exposing structural vulnerabilities in U.S. agriculture. While the country produces a portion of its fertilizer domestically, it remains deeply integrated into global markets. Industry leaders emphasize that shocks in one region-such as the Middle East-can quickly translate into higher input costs nationwide.

The situation is particularly challenging for farmers who did not lock in fertilizer prices earlier in the season. After several financially difficult years, many producers lacked the liquidity to prepay for inputs, leaving them exposed to current market volatility.

As planting season approaches, uncertainty around fertilizer availability and affordability is intensifying. Policymakers face mounting pressure to address both short-term supply constraints and long-term structural issues, including trade policy, energy regulation, and market concentration in the fertilizer industry.