I started writing about critical minerals for two reasons. First, I wanted to understand them better: what they actually are, where they show up in daily life, and why they matter beyond policy briefs and headlines. Second, I wanted to explore the kind of leverage they give Canada as it navigates a world that is increasingly ruptured from the old order, as Mark Carney recently described.
Critical minerals sit at the intersection of energy, food, security, and trade. They shape how countries grow, cooperate, and compete. This series is an attempt to make that connection visible: one mineral, one story at a time.
Read the other articles in this series here:
Potash: The Critical Mineral We Forget Because We Assume We’ll Always Eat
Much of the conversation around critical minerals has been framed by energy. Lithium for batteries. Nickel for EVs. Uranium for baseload power. Rare earths for magnets and data centres. The story is compelling, urgent, and necessary. But it skips something fundamental.
Before we electrify, digitize, or decarbonize, we have to eat.
Food security depends just as much on critical minerals, global cooperation, and long-term stewardship as the energy transition does. And this is where Canada already leads, quietly, decisively, and at global scale, with potash.
What Potash Actually Is
Potash is not a single mineral, but a group of potassium-rich salts, most commonly potassium chloride. Potassium is one of the three essential nutrients plants need to grow, alongside nitrogen and phosphorus.
In practical terms, potash:
- strengthens plant roots,
- improves water-use efficiency,
- increases resistance to drought and disease,
- and raises crop yields on existing farmland.
That last point matters more than ever. As climate volatility increases and arable land becomes harder to expand without environmental damage, improving productivity on existing farmland is the most sustainable option available. Potash is not optional. It is foundational to modern agriculture.
Saskatchewan: The Centre of the Potash World
Canada holds the largest potash reserves globally, and Saskatchewan alone accounts for roughly 30 percent of global potash production. In most years, Canada produces between one-third and 40 percent of the world’s supply, making it the largest exporter by a wide margin. From a landmass that rarely features in geopolitical discussions, potash mined in Saskatchewan supports food systems in:
- Brazil, one of the world’s largest agricultural producers,
- the United States,
- China and Southeast Asia,
- and parts of Europe and Africa.
If potash exports from Saskatchewan slowed significantly, global food prices would respond within a single growing season. That is what strategic importance looks like when measured in calories instead of kilowatts. However, whilst the companies do get rich, the province doesn’t.
How Potash Is Extracted
Potash mining is industrial, capital-intensive, and highly regulated. There are two primary extraction methods used in Saskatchewan.
- The first is conventional underground mining, where deep shafts are sunk into the earth, ore is mechanically extracted, crushed, and brought to the surface for processing.
- The second is solution mining, where hot water is injected underground to dissolve the potash, which is then pumped to the surface and crystallized. This method is often used for deeper deposits or where conventional mining is less feasible.
Both approaches require significant energy, water management, long-term planning, and strict environmental oversight. Potash mining is not artisanal extraction. It is large-scale agricultural infrastructure.
What Happens After Processing
Once processed, potash becomes a standardized agricultural input. It is blended into fertilizers designed for specific crops, soils, and climates. From Saskatchewan, potash moves primarily by rail to ports on:
- the West Coast,
- the Great Lakes,
- and the Gulf of Mexico.
From there, it enters global supply chains that support everything from Brazilian soybeans to Southeast Asian rice production. Unlike many critical minerals, potash is rarely stockpiled for long periods. It moves with planting seasons. Its value is realized quickly and directly in food production.
The Challenges Ahead
Despite Canada’s dominance, the potash sector faces real challenges. Global supply is concentrated in only a few countries, including Canada, Russia, and Belarus. Geopolitical disruptions, sanctions, or trade restrictions can send fertilizer prices soaring, with immediate consequences for food affordability.
At the same time, agriculture is under pressure to reduce environmental impacts. Over-application of fertilizers can contribute to runoff and water contamination, while climate change complicates growing conditions. These pressures mean the future of potash is not just about producing more. It is about producing and using it better.
The Opportunity: Science, Technology, and Prairie-Led Innovation
This is where the next chapter opens. The real opportunity for Canada, and for the Prairies in particular, is not simply exporting potash, but building a science- and technology-led food security ecosystem around it. That includes:
- precision agriculture to reduce fertilizer waste,
- soil science to tailor nutrients to local conditions,
- data and satellite tools to optimize application timing,
- low-emission processing and logistics,
- and applied research that links farms, universities, and industry.
Solutions developed in Saskatchewan are directly transferable to other agricultural regions facing similar pressures. In that sense, potash becomes more than a commodity. It becomes a platform for exporting agricultural innovation.
Food Security Is a Strategic Asset
Critical minerals discussions often focus on electrification and industrial power. Potash reminds us that food is just as strategic as energy. Canada already plays a stabilizing role in global food systems through potash. The next step is deciding whether it wants to deepen that role through science, innovation, and value creation or remain primarily a bulk supplier in an increasingly fragile world.
Energy powers economies. Food sustains societies.
Potash sits at the intersection of both. And in a world that is learning, again, how fragile supply chains can be, that quiet leadership may be one of Canada’s most important advantages.