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About Protassium+

SOP from Compass Minerals is now Protassium+

Introducing Protassium+, the premium sulfate of potash (0-0-50-17S) that delivers high potassium and sulfate sulfur with virtually no chloride and low salt index. Protassium+ 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+ provides the equivalent potassium content of 50% potassium oxide (K2O), commonly referred to as potash.

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High Sulfur

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

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Low Chloride

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

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Low Salt

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

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Select a crop

Why Crops Need Protassium+

Alfalfa
Almonds
Avocado
Berries
Citrus
Grapes
Lettuce
Melons
Onions
Ornamentals
Peppers
Potatoes
Fruits & Veggies
Sweet Potatoes
Tobacco
Tomatoes
Tree Nuts
Turf
Alfalfa
Almonds
Avocado
Berries
Citrus
Grapes
Lettuce
Melons
Onions
Ornamentals
Peppers
Potatoes
Fruits & Veggies
Sweet Potatoes
Tobacco
Tomatoes
Tree Nuts
Turf

Quality and consistency

A Better Grade of Potassium

Protassium+ 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.

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Turf Products

Ideal turf and ornamentals grades for direct application or blends.

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Organic K+®

OMRI certified and used in organic farming in America for more than 30 years, the organic form of Protassium+ is Organic K+.

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A more efficient source of nutrients helps you bring more to the table.

(K)nowledge Center

Protassium+ Agronomic Assets

Find out more on why Protassium+ is the best potassium choice when it comes to optimizing plant health.

News & Insights

Read and review timely articles on plant fertility, industry trends, and grower concern.

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Tools

Put our K uptake calculator to work in your fields and enhance your knowledge.

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Research

Review a variety of field trials, plot studies, and research on plant fertility.

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Media

View presentations on plant nutrition and videos from experts in the field.

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Tools

Calculate Your K Uptake

A potassium deficiency steals plant quality and yield. Our expanding library of Uptake Calculators show how much potassium is removed from the soil and how much needs to be replaced to ensure the prosperity of your plants.