The K Source that Brings More to the Table

Protassium+® is a dual-nutrient source that delivers high potassium and sulfate sulfur with virtually no chloride and low salt index. It is the premium K source that helps your crops grow to their full potential.

Why Protassium+

A Premium K Source for Superior Almond Yields

News & Insight

Almonds Newsletter

Keep up with the latest insights about growing almonds.

Topic: almonds

August 31, 2014

Salts and Your California Orchard

Three salt-related issues challenge almost all almond orchards in California: saline soils, low-quality water, and a salt-sensitive crop. Learn more about the issues and how…

Topic: almonds

August 31, 2014

Preventing Soil Salinity

The areas where almonds are grown in California are facing rising amounts of salt in the soil. And, the Imperial Valley and western San Joaquin…

Topic: almonds

August 31, 2014

The Four “R’s” to Effective Post-Harvest Fertilizer Management

Post-harvest fertilizer management is key to helping ensure this year's almond yields will be just as successful as last year's. Using the 4R Plant Nutrition…

Topic: almonds

June 1, 2013

Almond Growers Face New Water and Salt Issues

California almond growers are used to water issues, but this year is worse. January and February 2013 were the driest in California’s recorded history, and…


Calculate Your K Uptake

Get an idea of how much potassium was depleted from your soil and how much Protassium+ you will need for replenishment.


Research & Insights

Plant Nutrition Research

...This research suggests that K deficiency is associated with higher mortality rates for fruiting spurs.[1]


 Edwin J. Reidel, Patrick H. Brown, Roger A. Duncan, and Steven A. Weinbaum report


University of California study


Roger Duncan, UCCE Pomology & Viticulture Advisor for Stanislaus County