The economic shock from the war in Iran is spreading through global supply chains, and the next pressure point may be food.
Energy prices surged first as the conflict disrupted traffic through the Strait of Hormuz, a key route for oil and fertilizer shipments.
That has driven fertilizer and fuel costs sharply higher—costs that are now beginning to hit farmers and, ultimately, the grocery aisle as higher input prices work their way through the food system.
Why It Matters
Those pressures are now reaching farmers—and setting the stage for higher food prices.
Fertilizer markets have tightened considerably, with nitrogen‑based products especially sensitive because they rely heavily on natural gas and global trade flows. As prices rise, farmers face difficult choices: absorb higher nitrogen costs, cut application rates and risk lower yields, or shift to crops that require less fertilizer.
Each path ultimately feeds into higher wholesale food prices. Analysts note that disruptions to fertilizer and fuel supply chains can significantly affect agricultural production, and if the conflict extends, millions more people could face acute hunger.
For U.S. consumers, the result is likely to be higher grocery bills as elevated input costs work their way from farms to distributors to store shelves.
Corn's Rising Costs Are Becoming a Systemwide Shock
Corn sits at the center of the American food economy, and the pressures building around it in 2026 are setting the stage for a broad reshaping of food prices.
Fertilizer costs—especially nitrogen products like urea—have surged as global trade routes remain disrupted by the war in Iran, creating a lagged but powerful inflationary wave that is only now beginning to hit farmers. As one expert put it, fertilizer acts as a “strategically systemic price,” meaning increases cascade through the entire food chain via corn, the country’s dominant feed grain.
The USDA’s latest Food Price Outlook shows that food‑at‑home prices are already running 2.4 percent higher year‑over‑year, with overall food inflation forecast to rise 3.6 percent in 2026. That includes a projected 3.1 percent increase for grocery prices and 3.9 percent for restaurant meals, both above their 20‑year historical averages.
Fertilizer Costs Are the Fuse Behind the Inflation Wave
The fertilizer shock is the most important and least visible driver of what comes next.
Wholesale nitrogen prices at the New Orleans benchmark have jumped sharply, and Midwest retail fertilizer typically follows with a lag of two to six weeks. Once those higher costs hit the Corn Belt, farmers face a set of difficult decisions: pay more to maintain full nitrogen application, cut back and risk lower yields, or shift acreage into crops like soybeans that require less fertilizer.
Each choice carries consequences: lower yields tighten supply, crop switching reshapes markets, and higher production costs inevitably work their way into food prices. As one agricultural economist put it, fertilizer is a “strategically systemic price," once it moves, everything else eventually does too.
Why Higher Corn Prices Raise the Cost of Meat, Dairy, and Eggs
Because corn is the dominant feed grain in the United States, rising corn costs show up quickly in the protein aisle.
Beef and veal prices are already 14.4 percent higher than a year ago, and the USDA expects them to rise another 10.1 percent in 2026 as the cattle herd continues to shrink. Poultry prices are also climbing, and while egg prices are projected to fall sharply after last year’s avian influenza shock, farm‑level egg markets remain volatile.
Dairy is facing its own pressures as milk prices fall at the farm level, but feed costs remain elevated. In every case, corn is the common denominator. When it becomes more expensive to feed animals, the cost of producing meat, milk, and eggs rises with it.
Even as production costs rise, the corn market is grappling with weak global demand and increased competition from major producers like Brazil.
The National Corn Growers Association has warned that without new demand drivers—particularly in ethanol and export markets—farm margins will remain under pressure.
That tension between high costs and soft prices creates the conditions for sudden swings, especially if weather, geopolitics, or supply chain disruptions add new stress. The USDA’s own historical data shows how quickly food inflation can accelerate when multiple shocks overlap, as it did in 2022 when food prices rose 9.9 percent, the fastest pace since 1979.
Corn’s price trajectory is shaping up to be one of the most consequential economic stories of the year.
Rising fertilizer costs, tightening domestic supplies, and shifting global demand are converging at a moment when food inflation is already accelerating. If corn becomes more expensive to grow, the effects won’t be limited to grain markets—they will ripple through meat, dairy, processed foods, and ultimately the grocery store checkout.
The inflationary impulse doesn’t arrive all at once. It builds, layer by layer, and corn is the layer that holds the entire system together.
