# U.S. farmers worry about fertilizer supply due to war with Iran : NPR

> Urea prices have spiked close to 30% since Iran shut shipping through the Strait of Hormuz, which has halted close to half of the world's urea exports. US farmers, including Kansas grower Matt Ubel, are facing higher nitrogen costs just as spring planting of corn begins.

- Date: 2026-03-26 · published 2026-03-26T12:00:00.000Z
- Category: geopolitics · region US · magnitude medium
- Page: https://feedsoft.ai/events/20466-u-s-farmers-worry-about-fertilizer-supply-due-to-war-with-iran-npr
- Commodities: [Urea](https://feedsoft.ai/c/UREA.md), [Corn](https://feedsoft.ai/c/CORN.md)

## Why it matters

Reduced Gulf fertilizer exports raise input costs for US corn growers during peak nitrogen application, which may trim planted acreage or yields and support feed grain prices.

## Read by commodity

- CORN: bullish ▲
- UREA: bullish ▲

## Linked price moves

| Commodity | Date | Window | Change % | z-score | Why linked |
| --- | --- | --- | --- | --- | --- |
| UREA | 2026-03-31 | 1 | +8.4% | 3.1 | Hormuz shipping halt reportedly stopped close to half of world urea exports, a trade-flow shock that supports continued upward pressure on urea. |

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| UREA | 2022-09-28 | [How the war in Ukraine is affecting the world's supply of fertilizer : NPR](https://feedsoft.ai/events/39891-how-the-war-in-ukraine-is-affecting-the-world-s-supply-of-fertilizer-npr.md) | -5.3% | -9.1% |
| UREA | 2022-02-24 | [US fertilizer suppliers withdraw offers](https://feedsoft.ai/events/43003-us-fertilizer-suppliers-withdraw-offers.md) | +20.1% | +41.3% |
| UREA | 2026-04-09 | [Iran war’s impact on fertilizer and fuel \| Reuters](https://feedsoft.ai/events/20032-iran-war-s-impact-on-fertilizer-and-fuel-reuters.md) | +2.4% | -12.4% |
| UREA | 2026-04-17 | [Argentina wheat threatened by high urea fertilizer prices due to  Iran war \| Reuters](https://feedsoft.ai/events/20035-argentina-wheat-threatened-by-high-urea-fertilizer-prices-due-to-iran-war.md) | -2.7% | -17.7% |
| UREA | 2026-07-02 | [Iran war: From fertilizer to food crisis? \| IFPRI](https://feedsoft.ai/events/18269-iran-war-from-fertilizer-to-food-crisis-ifpri.md) | +2.7% | +12.1% |
| CORN | 2026-07-02 | [Iran war: From fertilizer to food crisis? \| IFPRI](https://feedsoft.ai/events/18269-iran-war-from-fertilizer-to-food-crisis-ifpri.md) | +0.8% | +3.2% |
| CORN | 2026-03-23 | [Corn Prices: Crop Hits Two-Week High as Iran War Threatens Fertilizer Supply - Bloomberg](https://feedsoft.ai/events/20182-corn-prices-crop-hits-two-week-high-as-iran-war-threatens-fertilizer-supply.md) | -0.3% | -1.8% |
| CORN | 2022-08-23 | [Fertiliser supply tightens as gas price rises further - Farmers Weekly](https://feedsoft.ai/events/5142-fertiliser-supply-tightens-as-gas-price-rises-further-farmers-weekly.md) | +5.2% | +3.4% |

## Sources

- npr.org: https://www.npr.org/2026/03/26/g-s1-115240/iran-war-strait-hormuz-fertilizer-exports-farmers-planting-season

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.