Potassium Magnesium Sulfate
Organic Fertilizer

Potassium Magnesium Sulfate organic fertilizer is mined and processed into a low cost Potassium fertilizer. PMS is a source of highly soluble potassium, and has the additional benefit of supplying Sulfur and Magnesium. It has been used by organic gardeners where potassium is a limiting nutrient and it does not contain high amounts of chloride that many plants are sensitive to.

PMS is an effective source of Sulfur and contains 22 percent Sulfur.  PMS is water soluble and makes a good liquid fertilizer.

Potassium Magnesium Sulfate organic fertilizer


Sulfur is vital to the health of plants for protein production and plant enzymes. Plants suffering from Sulfur deficiency are light green. Often Sulfur deficiency is confused with nitrogen deficiency.  One way to tell the difference is identifying where the "light green" is occurring in the plant. Nitrogen deficiency is more noticeable in the lower, and Sulfur deficiency is more noticeable in the upper parts of the plant and this occurs at the beginning of the season when the whether is cool.


Magnesium is essential to strengthen the plant's cell walls, and assists in the uptake of Nitrogen, Phosphorus and Sulfur. Magnesium is also important of production of chlorophyll. Deficiency is marked with whitish stripes between the leaf veins.


  • Used to improve a plants overall health
  • Used to increased root growth
  • Promotes growth and dark greening of plants
  • Can be added to the surface or blended into the soil
  • Improves drought tolerance
  • Increases stalks with long-branched roots
  • Helps reduce premature fruit drop
  • Low cost Potassium source


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