Iran War Spikes US Gas, Diesel and Fertilizer Prices, Squeezing Farmers and Small Businesses

American drivers, grocers and farmers are absorbing higher costs from the 2026 conflict with Iran, with average gasoline prices climbing above $4 a gallon and diesel reaching $5.40 in many markets. The disruption began after U.S. and Israeli strikes on February 28 targeted Iranian nuclear facilities and missile production sites, prompting Iranian responses that damaged oil infrastructure and restricted shipping through the Strait of Hormuz. That chokepoint handles roughly one-fifth of global oil trade and up to a third of fertilizer shipments from Gulf producers, according to industry analyses.

The war lasted approximately 40 days before a ceasefire took hold in mid-April, with shipping partially resuming by April 16. Yet the price shocks have lingered. Truckers added fuel surcharges to delivery contracts, according to Todd Spencer of the Owner-Operator Independent Drivers Association. Independent grocers reported diesel, packaging and energy costs compounding at every stage from field to shelf. Fertilizer prices jumped about 45 percent, per reports citing the American Farm Bureau Federation, which found 70 percent of farmers could not afford full applications for the current planting season. Some switched from corn to soybeans or cut acreage, adding an estimated $35 per acre to corn production costs in certain analyses.

A Reuters/Ipsos poll conducted April 15-20 found 77 percent of registered voters said President Trump bore at least some responsibility for the price surge, including 55 percent of Republicans. Fifty-eight percent said they would be less likely to support midterm candidates backing Trump's approach to the conflict. The survey's exact crosstabs on blame could not be independently verified in all secondary reports. Republicans hold narrow majorities in Congress heading into the November midterms; party strategists cited in the poll coverage expressed concern that sustained high prices could erode their edge on economic issues, where their advantage had narrowed from 14 points in January 2025 to roughly 1 point.

Small family farms face the sharpest margin pressure. With net profits often between 1 and 2 percent, many lack reserves to absorb repeated shocks, according to John Ross of the Independent Grocers Alliance. The U.S. government issued roughly $12 billion in additional farm subsidies, but Ross and others suggested this may prove insufficient if the cycle of higher input costs and lower yields repeats. Longer-term questions remain about U.S. agriculture's dependence on natural-gas-derived nitrogen fertilizer. Experts including soil scientists at the University of Saskatchewan and Columbia University noted that alternatives such as precision application, expanded crop rotation, or renewable-powered ammonia synthesis exist but require infrastructure investment and changes to federal farm policy that have so far proved elusive.

The conflict also exposed limits of air power against dispersed production facilities. Israeli and U.S. analysts said Iran replenished missile stocks faster than expected from prior engagements, though specific claims of 700 ballistic missiles fired and 23 Israeli civilian deaths were not corroborated by all trackers. Iranian casualties, estimated above 3,000 by several international outlets, received less attention in U.S. tactical assessments. On the economic side, JPMorgan analysts warned of cascading effects into fall harvests and imported produce, while noting that localized supply chains offered small grocers modest short-term insulation compared with national chains.

Whether these disruptions prove temporary or accelerate structural reforms in energy and agriculture will shape household budgets through 2026 and beyond. Prices had begun easing in late April in some markets as shipping lanes reopened, yet consumer sentiment data showed 82 percent still viewed inflation as a major concern. The episode underscores how distant military decisions can rapidly translate into domestic price volatility when global commodities are involved.