Potash does not photograph well. It is a pinkish-white mineral salt, mined a kilometre underground in Saskatchewan, and its job is unglamorous: it is the potassium in the fertilizer that keeps crop yields from collapsing. For most of its history it traded like any other bulk commodity, priced by supply and demand, ignored by everyone who did not farm. Then Russia invaded Ukraine, and a rock nobody thought about became something governments worry about.

The company at the centre of that shift is Nutrien, the Saskatchewan-based producer that is the world’s largest supplier of crop nutrients. It controls roughly a fifth of global potash capacity, with additional heft in nitrogen and phosphate, and its 2025 results — net earnings of US$2.3 billion, potash sales volumes around 13.6 million tonnes — reflect a market that has tightened in its favour. Its 2026 guidance points to continued strength, with retail earnings in the high hundreds of millions and steady growth in proprietary products.

Why a fertilizer firm became a security story

The date that changed Nutrien’s strategic position is 2022. Russia and Belarus together supplied close to 40 percent of the world’s potash before the war; export restrictions and sanctions disrupted that supply, and the world’s buyers turned toward the largest producer sitting safely outside the conflict. Saskatchewan’s mines went from being one source among several to something approaching indispensable.

The advantage compounded elsewhere in Nutrien’s portfolio. China extended phosphate export restrictions — reported through into 2026 — which squeezed the products Nutrien’s phosphate business competes against, tightening a market the company sells into. There is a policy oddity worth noting here: Canada has not formally designated potash a critical mineral under its own national-security framework, even as allies move the other way — the EU’s Critical Raw Materials Act treats potash-related nutrients as strategically significant. Ottawa promotes the security value of its minerals abroad while leaving the one that literally feeds the world off its own list.

The retail edge

What separates Nutrien from a pure commodity miner is the last mile. It runs a retail network of roughly 2,500 farm-service locations across North America, Australia and Latin America — meaning it both produces crop nutrients and sells them directly to farmers, along with seed, chemicals and advice. That dual role gives it something bulk producers lack: a hand on price and a direct relationship with demand. It is as much a farm-services company as a mining one, which is why its earnings hold up even when commodity prices wobble.

The company is not standing still on its footprint, either — it has been reviewing strategic alternatives for its phosphate business and moving to shut down its higher-cost Trinidad nitrogen operations, the kind of portfolio pruning that signals a producer concentrating on where its advantage is deepest, which is potash.

The trade-off it cannot outrun

Nutrien’s long-term governance problem is written into the chemistry of its product. Nitrogen fertilizer production is energy-intensive and a meaningful source of greenhouse-gas emissions. The company is investing in lower-carbon “green” ammonia, but it has not committed to a Paris-aligned emissions-reduction timeline — a gap that becomes more conspicuous the more central it is to global food supply. The tension is genuine and not easily resolved: the world needs more of what Nutrien makes to feed a growing population, and making it cleanly at scale is a problem no fertilizer company has yet solved.

For now, Nutrien occupies an enviable position — the low-cost, politically stable supplier of a mineral the world cannot do without, in an era that keeps reminding everyone how much that matters. The strategic question is not whether it profits from that. It is whether Canada ever decides that a company controlling a fifth of the world’s potash belongs in its national-security thinking, rather than just on its balance sheet.

Reading list

  • Nutrien 2025 annual results and 2026 guidance
  • Rabobank fertilizer outlook (2026)
  • EU Critical Raw Materials Act: treatment of potash-related nutrients
  • IFPRI and WEF analyses of fertilizer-market geopolitics (2026)