Potassium (K) is classified as a macro-nutrientĀ and is considered second only to nitrogen in terms of its importance to plant growth. Plants require K for vital intracellular function which indirectly support plant growth, including nutrient transport, photosynthesis, and stomata regulation. K availability is highly variable and in nature, up to 95% of the total K is unavailable for plant uptake. Soil microbes can naturally unlock bound nutrients, significantly increasing plant K uptake.

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