Sage Potash Hits 36.3% KCl in Utah, Among World’s Best Potash Grades

A single drill hole in Utah returned 13.1 metres averaging 36.3% KCl, with three separate sub-intervals breaking above 52% KCl. That is the number that matters, and it came from Sage Potash Corp’s Peterson 1 hole at its Sage Plain Project.

Grades like these are rare. CEO Pat Varas described the high-grade intercepts as having very few comparable equivalents anywhere in the world, and mining media now place Peterson 1 among the highest-grade potash deposits globally.

A domestic US potash project returning results of this tenor carries weight beyond a standard junior-miner drill release, because the United States imports almost all the potash it uses.

This covers what the hole actually returned, why the purity data matters as much as the grade headline, the milestone sequence that follows, the strategic supply context, and the risks that remain before Sage Potash reaches a prefeasibility study. By the end, you will know whether these grades translate into a credible development case, and what to watch over the next 90 days.

What the Peterson 1 hole actually returned

The results break into two potash beds within the same Cycle 18 sequence, and each tells part of the story.

The Upper Cycle 18 bed returned 8.1 metres averaging 36.1% KCl. Nested inside that intercept sat two high-grade sections: a 3.3-metre sub-interval at 52.5% KCl and a 1.0-metre sub-interval at 52.0% KCl.

The Lower Cycle 18 bed added 5.0 metres averaging 36.4% KCl, carrying its own 3.1-metre sub-interval at 53.4% KCl.

Combine the two beds and the full Cycle 18 sequence delivered 13.1 metres averaging 36.3% KCl. That is the headline figure, and it is the one the market will anchor to.

All assays were processed by the Saskatchewan Research Council laboratory. Drilling finished in August 2026, and Sage Potash released the results on 28 September 2026.

The detail that matters most to you is not any single peak. It is that three separate sub-intervals cleared 52% KCl within one hole.

“These high-grade intercepts have very few comparable equivalents globally in terms of mineralisation tenor,” said Pat Varas, Chief Executive Officer of Sage Potash Corp.

Repeating high-grade zones, rather than one lucky spike, is what points toward resource continuity. That is the difference between a genuine discovery and a statistical outlier, and the Peterson 1 data leans firmly toward the former.

Why ore purity is as significant as the grade headline

Grade grabs the headline. Purity decides the economics.

Both Cycle 18 beds returned less than 1% insoluble material and less than 0.1% carnallite. For a potash project, those two figures carry nearly as much weight as the KCl grade itself, because they shape what it costs to turn ore into saleable product.

Here is what each attribute means for a processing circuit:

• Insolubles below 1%: less non-potash rock to grind, handle, and separate, which cuts reagent use, tailings volume, and energy demand.
• Carnallite below 0.1%: low magnesium and chloride load in the brines, which keeps the flowsheet simpler.

Carnallite is a magnesium-bearing potassium chloride mineral that complicates processing when it appears in volume. It makes crystallisation harder, accelerates corrosion, and can force additional process steps or blending. Keeping it below 0.1% removes those costs before they arise.

The low insolubles and near-zero carnallite that Peterson 1 returned connect directly to potash processing economics, where ore purity determines flowsheet complexity, reagent consumption, and capital intensity more reliably than the headline grade alone.

Low insolubles feed the same logic from the other direction. Less waste rock means a simpler flowsheet, smaller tailings footprint, and lower reagent consumption across the circuit.

The historic Sage Plain resource set the benchmark the company is working against: 42.1% KCl, less than 1% insolubles, and 0.01% carnallite. Peterson 1 sits in the same clean, high-tenor category.

For an investor weighing a junior potash name, purity like this signals that processing capital intensity is likely to run lower than it would for deposits with dirtier ore. That flows straight through to project net present value, and it is precisely the case the prefeasibility study will need to demonstrate in hard numbers. It is why the technical team and mining media treat these figures as a standalone positive, not a footnote.

The development pipeline from resource update to prefeasibility study

Each upcoming milestone functions as a test the project must pass before the next one unlocks.

The first test is the updated resource estimate. Sage Potash has engaged engineering firm RESPEC to deliver an updated NI 43-101 resource estimate within roughly 45 days of the 28 September release, targeting mid-to-late November 2026. An NI 43-101 estimate is the standard mineral resource report required under Canadian disclosure rules, classified by confidence level from inferred up to measured and indicated.

An NI 43-101 resource estimate classifies tonnes and grade by confidence level, moving from inferred through to measured and indicated as drilling density increases; the RESPEC update due in mid-to-late November 2026 will apply that framework to determine whether Peterson 1’s step-out location lifts the project beyond its prior 298-million-tonne inferred base.

Because Peterson 1 is a step-out hole drilled about one kilometre north of prior holes, the update is expected to expand the resource materially beyond the prior 298-million-tonne inferred figure set in the September 2025 preliminary economic assessment.

The milestone pathway runs in sequence:

1. Updated NI 43-101 resource estimate from RESPEC.
2. Further financing round, anticipated after the resource update.
3. Launch of prefeasibility study engineering.
4. Prefeasibility study completion, targeted for H1 2027.

On financing, the company closed the second and final tranche of a unit offering around the time of the assay release, with a further raise expected once the updated resource lands.

The telling decision is what management chose to skip. Rather than run a second preliminary economic assessment, Sage Potash plans to proceed directly to prefeasibility-level engineering. That choice tells you management believes Peterson 1 has improved the project enough that another preliminary study would delay the path to production financing rather than de-risk it.

For anyone tracking the company, the 45-day window to the resource update is the nearest catalyst, and it is designed to prove expanded tonnage and an upgrade from inferred toward measured and indicated classification.

What US potash import dependence means for a project like this

The United States barely produces the potash it consumes. USGS 2025 data puts net import reliance at 92-93% of apparent consumption, and a 2026 study in the Journal of Agricultural and Applied Economics puts the total import share at 95%.

US potash import dependence has its roots in geology as much as policy: the continental United States holds commercially viable evaporite deposits, but most sit far from the scale and infrastructure of Canada’s Saskatchewan basin, which is why 83% of US supply still flows across the northern border.

That import dependence is a structural fact. Where the supply comes from is the geopolitical one.

The import breakdown runs as follows:

• Canada: 83%
• Russia: 6%
• Belarus: 6%
• Other: 5%

Canada supplies the stable bulk. But Russia and Belarus, which together account for 12% of US potash imports, sit under sanctions or geopolitical tension. That leaves US agriculture with a latent supply-chain vulnerability that Canadian volumes do not fully cover.

“American potash for American food security” is how Sage Potash frames its mission.

Against this backdrop, that framing reads less like marketing and more like a description of a quantifiable gap. A domestic project of Peterson 1’s scale and grade would address a portion of the Russia and Belarus exposure regardless of how policy classifies it.

One caveat matters for the policy angle: potash is not currently on the formal US critical minerals list, which limits some categories of direct government support. The strategic case here rests on structural demand and supply concentration, not on a critical-minerals designation. For you as an investor, that is the distinction that separates a US-based potash project from an equivalent-grade deposit in a commodity-exporting country, and it is worth asking whether the domestic premium is structurally durable or merely cyclical.

Where Peterson 1 stands on the risk curve

World-class grades reduce the geological question. They do not eliminate the rest.

Six risk categories remain live at this stage of development:

• Financing and dilution: repeated equity raises are required before production, and two tranches of a unit offering are already done with another anticipated.
• Resource conversion: Peterson 1 must translate into expanded measured and indicated tonnes beyond the prior 298-million-tonne inferred base.
• Timeline slippage: the H1 2027 prefeasibility target is aspirational, and junior timelines frequently slip on drilling, assay, and permitting delays.
• Commodity price exposure: potash prices are cyclical, and weaker prices at decision points would cut project value.
• Technical and processing risk: metallurgical test work and mining method selection are not yet complete.
• Permitting and ESG: federal, state, and local approvals are not yet addressed in company disclosures.

Scale that financing risk against the sector norm. New potash mines frequently require hundreds of millions to over one billion US dollars in capital, which means repeated raises and likely strategic or offtake-linked financing before any production.

New potash mine capital requirements have reset sharply upward across the sector, with BHP’s Jansen Stage 1 in Canada serving as the clearest recent benchmark for how infrastructure, shaft-sinking, and processing costs compound at scale, a reference point that will sit behind any financing conversations Sage Potash initiates after the RESPEC resource update.

None of these are presented as fatal. They are stage-of-development risks, and the grade data de-risks the geology more than any other single factor. The financing, permitting, and timeline questions stay open, and the prefeasibility study is the document that will begin to answer them in quantified terms.

Understanding where Sage Potash sits on this curve lets you calibrate position sizing and monitor the right indicators: the resource update, the financing close, and the PFS scope. That beats reacting to each press release in isolation.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results. Financial projections are subject to market conditions and various risk factors.

Peterson 1 changes the resource conversation, but the project still has to earn its economics

The grade data is settled context now, not news. Three sub-intervals above 52% KCl, clean ore under 1% insolubles, and a combined 13.1 metres at 36.3% KCl establish that the geology is genuinely strong. The question has moved from whether the rock is good to whether the project can convert that quality into economics.

The next 90 days provide the first answer. The RESPEC resource update in mid-to-late November 2026 will show whether Peterson 1’s step-out location expands the resource beyond 298 million tonnes and lifts tonnage from inferred toward measured and indicated.

After that, the prefeasibility study targeted for H1 2027 becomes the document where the project’s economics are either validated or revised. For anyone monitoring this story, those two milestones, not the next press release, are the rational focus.