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Fertilizers for Sulfur or Magnesium

Magnesium & Sulfur Fertilizers

Boost the health of your plants with magnesium or sulfur fertilizers!

Magnesium Fertilizers

Magnesium is naturally found in some types of clay soils. Clay soils with high magnesium are composed of the type of clay that can be used for pottery because the magnesium binds the clay together. Like potassium, magnesium is important for plant metabolic processes, especially in chlorophyll production and in the uptake of phosphorus. Too much magnesium can “bind up” your soil so that water and nutrients do not penetrate well, in addition to causing high pH. You can add magnesium either with or without calcium depending on the amendment you use.

Sulfur Fertilizers

Sulfur (S) is an important nutrient often forgotten as a needed element in the soil’s mineral bank. Though it exists as elemental sulfur in some places on earth, sulfur is usually found as a natural compound, such as gypsum. Like nitrogen, it is also an important ingredient for the fabrication of proteins. A soil very high in sulfur can be acidic, but it takes an extremely high amount to cause damage to plants.

Fertilizer Solution Chart Soil Testing Supplies

Tiger 90 Soil Sulfur (50 Lbs)



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Azomite - Micronized (2 lb)



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Sulfate of Potash (50 Lb)



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Dolomite (50 Lb)


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Azomite Micronized (44 lb)



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Soil Sulfur (5 lb box)



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Monterey Dr. Iron (7 lb)


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FoxFarm Cal-Mag (1 qt)


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FoxFarm Cal-Mag (1 gal)


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