About Protassium+

SOP from Compass Minerals is Protassium+®

Protassium+ sulfate of potash (0-0-50-17S) delivers high potassium and sulfate sulfur with virtually no chloride and low salt index. Protassium+ SOP is the K source high-performing growers, crop consultants and retailers have trusted for decades to improve plant health and optimize yields.

High Potassium

Protassium+ SOP provides the equivalent potassium content of 50% potassium oxide (K₂O), commonly referred to as potash.

High Sulfur

With 17% sulfur content, Protassium+ SOP is an excellent source of the readily available sulfate sulfur.

Low Chloride

Protassium+ SOP contains less than 1% chloride content, minimizing the risk that chloride can have on plants.

Low Salt

Protassium+ SOP has the lowest salt index per unit of K₂O of all major potassium sources which is better for your yields.

Quality and consistency

A Better Grade of Potassium

Protassium+ SOP provides 50% K₂O and 17% sulfate sulfur and comes in a variety of particle sizes to create better, more uniform custom blends.

Ag Products

Sized for everything from broadcast spreaders to rapid dissolution for liquid applications.

Turf Products

Ideal turf and ornamentals grades for direct application or blends.

Organic Products

Used in organic farming in America for more than 30 years.

Soluble Products

Ideal for production of liquid blends or rapid dissolution for liquid applications.

Select a crop

Why Crops Need Protassium+ Potassium Fertilizer