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Premium Bentonite Degradable Sulfur Fertilizers Made To Perform

Uncompromising Quality Since 1998.

Keg River manufactures our line of premium bentonite degradable sulfur fertilizers for commercial sale across North America. High sulfur analysis, superior degradability, safe handling and exceptional value make our products a leading choice as a nutritional sulfur fertilizer or for soil amendment.

KEG90S™ (0-0-0-90S)
Our top-selling bentonite degradable sulfur fertilizer offers unmatched value.

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KEG85S™ (0-0-0-85S)
50% more bentonite for enhanced degradability and optimal dust control.

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KEG50S+ (12-0-0-50S)
Blends AMS with Keg90S™ for an immediate and season-long source of sulfur.

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KEG90S™ Organic (0-0-0-90S)
Our most popular bentonite degradable sulfur fertilizer is OMRI listed for organic use.

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KEG85S™ Organic (0-0-0-85S)
The trusted performance of Keg85S™ in an OMRI listed organic fertilizer.

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Bentonite Sulfur. Done Right.

Best Clays

Cleanest Sulfur (Degassed)

Superior Dust Control

Greater Degradability

Flexible Application

Consistent Quality

Dependable Logistics

Organic Line

Not All Clays Are Created Equal

Bentonite clay plays a pivotal role in the delivery of elemental sulfur, and its conversion to plant-available sulfate in the soil. We’ve created these videos to explain the role and importance of high quality clay.

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Very friendly shipping staff. Very quick to load me and get me on my way. I wish every shipper/receiver was like this.

Download the Keg River Sulfur Uptake Chart

A free download to help you calculate sulfur needs by crop.