Sulfur & Magnesium Fertilizers

Compare products by nutrient analysis, formulation, application method and label directions.

Natural Soil Sulfur package

Magnesium & Sulfur Fertilizers

Sulfur and Magnesium Fertilizers for Garden Soil and Plant Nutrition

Sulfur and magnesium are essential plant nutrients that support important functions such as chlorophyll formation, photosynthesis, and overall plant growth. Our collection of sulfur and magnesium fertilizers includes products that provide sulfur, magnesium, and other secondary or micronutrients for addressing specific soil and plant nutrition needs.

This collection includes soil sulfur, Epsom salts, langbeinite, gypsum, dolomite, sulfate of potash, and Cal-Mag products, along with mineral and trace-nutrient amendments such as zinc, manganese, iron, and glacial rock dust. Different products provide different nutrients, so selecting an amendment based on soil conditions and plant requirements can help avoid unnecessary applications.

Soil testing is a useful starting point when determining whether additional nutrients or soil amendments are needed. Sulfur can also be used to help lower soil pH in appropriate conditions, while dolomite supplies calcium and magnesium and can raise soil pH. Gypsum supplies calcium and sulfur without significantly changing soil pH.

For additional options, explore our fertilizers with sulfur, pH correcting fertilizers, and trace minerals fertilizer collections. You can also browse our broader selection of fertilizer and growing supplies.

Whether you're addressing a documented nutrient deficiency, managing soil pH, or providing specific secondary and micronutrients, our selection offers practical products for a variety of garden and landscape needs.