The war in Iran has blocked the Strait of Hormuz, halting vessel traffic. A third of globally traded urea flows through this strait, with top exporters Iran, Qatar, and Saudi Arabia stuck behind it. Urea prices rose 19% in the first week of the war. The U.S.'s biggest import month is April, but shipping and inland logistics mean even immediate resumption would delay deliveries to farmers until mid-May, which is too late for planting. This is a physical supply shock at the peak of seasonal demand in major agricultural economies. Finite storage in the Gulf region is leading to production shutdowns. The disruption is described as brand new and unprecedented in 24 years. WATCH due to a clear, acute, and time-sensitive supply constraint that has already caused significant price inflation and poses a direct threat to crop inputs and broader food price inflation. The situation is dynamic and critical for the upcoming planting season. A swift end to the war and reopening of the Strait of Hormuz could allow supply chains to restart, potentially alleviating pressure, though backlog and timing issues would remain for the current season.