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By: Editorial Team, StoneX Media
As of 12 March 2026, fertilizer volatility is emerging as a defining risk factor for global grain margins. The escalation of conflict involving Iran has triggered sharp energy price swings and disrupted critical shipping routes, raising questions about nitrogen, phosphate and urea availability. Grain markets are now contending not only with price volatility in crops but also with uncertainty in the cost structure that underpins farmer profitability. The resulting tension between selling crops and securing future inputs is increasingly shaping trade flows across Europe and beyond.
Bertrand Oesterle, StoneX VP of Clearing and Execution Sales, has spent years working with commercial grain participants across Europe on execution strategy and risk management. His direct exposure to farmer hedging behavior and fertilizer-linked cost pressures gives him a front-line view of how geopolitical shocks translate into agricultural margin stress.
Fertilizer supply disruptions are directly tightening grain margins as export flows stall and production pauses across key regions. Bertrand Oesterle warns that the closure of the Strait of Hormuz is "simply a nightmare scenario" for nitrogen, phosphates and urea, citing lost shipping days and output being put on hold while exports become impossible. Consequently, fertilizer prices have risen significantly, increasing input costs for upcoming planting cycles. Grain producers now face a compressed margin environment in which future cost uncertainty weighs heavily on current selling decisions.
European grain markets are experiencing muted farmer selling as uncertainty over fertilizer costs alters risk tolerance. Oesterle notes that in France there is almost no farmer selling, reflecting concern that winter planting fertilizers could become materially more expensive if the conflict persists. Some producers now prefer to wait for higher crop prices to offset potential input inflation rather than lock in current margins. This defensive stance reduces near-term grain availability, reinforcing price volatility across wheat and oilseed markets.
The Strait of Hormuz is a key shipping route for nitrogen, phosphates and urea. Disruption there leads to lost shipping days, stalled exports and higher fertilizer prices.
Farmers fear higher winter planting input costs, which could squeeze margins. This uncertainty is reducing crop selling in parts of Europe as producers wait for better prices.
No. While energy volatility feeds into grains, fertilizer availability and freight costs are also influencing trade flows and farmer behavior.
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--- Written by Frédéric Guétin, StoneX TV Producer
--- Expert: Bertrand Oesterle, StoneX VP of Clearing and Execution Sales
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