Geopolitics meets planting season
The fragile ceasefire between the United States and Iran is starting to fray. Fertiliser ship traffic through the Strait of Hormuz and the wider Gulf has dropped sharply. The Gulf region accounts for around one-third of global urea export supply, so any sustained disruption quickly tightens nitrogen markets worldwide.
Ship-tracking data show that only four empty vessels scheduled to load fertiliser cargoes have transited the Strait of Hormuz into the Gulf since 30 June. Before the conflict, between 20 and 40 vessels a week typically loaded fertilisers from ports across the Gulf. That flow has now fallen to around five ships per week, according to Serena Piazzo, dry bulk analyst at maritime broker Ifchor Galbraiths. Producers have fewer options to move product, and importers have fewer options to secure supply.
The timing is difficult for Southern Hemisphere producers. Brazil and Argentina are ramping up demand ahead of key planting windows for maize and soy, just as logistics through Hormuz stall again after new Iranian attacks on commercial vessels. Analysts now frame the constraint mainly as a shipping, freight, and insurance problem — not a production shortfall. Plants in the Gulf continue to run, but cargoes are harder to move. Physical availability and freight premia, rather than outright scarcity, are driving price dynamics.
Farmers also face additional climate uncertainty. Forecasts for an exceptionally strong El Niño are raising weather risks for South American growers. They already contend with volatile fertiliser flows and higher energy costs linked to the Iran conflict. That mix increases input price risk just as producers set nutrient programmes for the new season.
Margin pressure and new investment signals
Brazil’s nitrogen exposure is clear. Urea imports into the country fell 32% in the first half of 2026. Farmers delayed purchases and switched to cheaper nitrogen products during the height of the conflict, according to Alexis Maxwell, senior agriculture analyst at Bloomberg Intelligence. That substitution helped manage cash flow and working capital. However, it also highlights how sensitive Brazilian agribusiness remains to external shocks in a single nutrient stream.
Price data show the tension feeding through to benchmarks. As Northern Hemisphere demand eased and the Iran war initially looked close to resolution, urea had shed its war-related price premium by mid-June. With Brazilian and Argentine buying now picking up into their planting windows, and with Hormuz logistics again constrained, New Orleans urea prices were more than 3% higher on 3 July, ending a five-week losing streak. For grain and soy exporters, that signals rising input costs and potential margin compression unless they can pass higher fertiliser prices down the chain or hedge exposure effectively.
For investors, the Hormuz fertiliser risk crystallises several themes. First, global nitrogen trade still relies on a narrow set of routes and producers, with the Gulf central to seaborne urea. Second, South American agribusiness, despite its scale and sophistication, continues to depend on imported nitrogen from geopolitically exposed regions. Third, constraints are creating potential upside for domestic fertiliser capacity and for suppliers of alternative nitrogen products that can substitute for urea when prices spike.
Brazil’s state-controlled energy group Petrobras has already been studying options to expand fertiliser output, including doubling capacity at its nitrogen plants. That positions it as a partial hedge against external shocks. If Hormuz disruptions persist into 2027, as some Gulf producers suggest for full traffic normalisation, domestic and regional projects could attract more capital and policy support.
Investors should track three moving parts: the durability of the US–Iran ceasefire and any further attacks near Hormuz; weekly vessel counts and loadings from Gulf fertiliser ports; and how quickly Brazil and Argentina shift towards local production and diversified nutrient sources. The Hormuz fertiliser risk will remain a live issue until shipping flows and insurance cover through the strait normalise again.
