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Great Salt Lake Minerals is now Compass Minerals.

Compass Minerals uses the natural richness of the Great Salt Lake to refine the vital nutrients that crops, orchards, ornamentals and turf need for health and growth.

Compass Minerals is the largest producer of Sulfate of Potash in North America and the largest producer of magnesium chloride.

Protassium+ is Compass Minerals’ premium, Sulfate of Potash product that provides superior plant and crop nutrition that the nation’s top growers demand.  

Chlori-Mag®, is Compass Minerals’ magnesium chloride product, an additive for wheat, corn and grain sorghum growers

A Premier Potassium Source for Unparalleled Fertility Management

Elite Fertility Products for Optimized Yield

Nourishing Resilient, High-Performing Turf

Maximizing Yield with a High-quality Chloride Source

Organic Grade Fertilizers for High-quality Produce


The K Source that Brings More to the Table

health plants Protassium+ is a high-analysis, dual-nutrient providing potassium and sulfate sulfur. Learn how Protassium+ can increase quality and yield. 

A Better Grade of Protassium+

From standard to organic grades, Protassium+ brings a better fit to your fertilization management strategy. Choose from a variety of products and particle sizes* for convenient application and easy blending.



© 2014 Compass Minerals. All Rights Reserved 
9900 W. 109th St., Suite 100, Overland Park, KS 66210 | Phone: 913-344-9200