Walk into any American supermarket this week and you'll feel it before you even check the receipt—prices creeping back up on items that had finally stabilized. What economists are already calling a "second wave" of food inflation is building, and it threatens to undo two years of painful progress.
It starts with fertilizer. Iran is a major producer of petrochemicals used in nitrogen-based fertilizers, and several Gulf neighbors who supply phosphate and potash have curtailed shipments amid regional instability. The USDA warned this week that domestic fertilizer prices—already elevated following Russia's 2022 invasion of Ukraine—have jumped another 18% in just three weeks. American farmers who buy fertilizer months ahead of planting season are now locked into contracts or facing spot prices that'll force them to either absorb the losses or pass them along at harvest.
Fuel makes it worse at every step. Diesel is the lifeblood of American agriculture—tractors, combines, irrigation pumps, the refrigerated trucks hauling food from farm to distribution center all run on it. With diesel up more than 30 cents per gallon since the conflict started, every link in the food supply chain is more expensive.
The hardest-hit items at the store aren't surprising: bread (wheat futures are up 14%), eggs and poultry (feed costs climbing sharply), fresh produce—particularly anything with a long supply chain like berries and citrus—and beef, where higher corn and fuel costs are squeezing feedlot margins.
For an average family spending around $1,000 a month on groceries, a 5–7% food inflation increase adds $50–$70 per month, up to $840 a year. It hits hardest for lower-income families who already spend a larger share of their budgets on food and have fewer options to swap in cheaper alternatives. Food banks in major cities are already seeing more calls and walk-ins—usually an early sign that financial stress is spreading faster than the headlines suggest.
Kroger and Walmart have reportedly been in talks with suppliers about price renegotiations. Industry analysts at Cowen note that grocery retailers typically absorb about 30% of input cost increases and pass the other 70% directly to consumers—which means the real sticker shock at the checkout hasn't fully arrived yet.