Collection: Sulfur & Magnesium Fertilizers
Compare products by nutrient analysis, formulation, application method and label directions.
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Sup'R Green Organic Chicken Manure (Composted) (25 lb)
Regular price $6.99Sale $6.99Unit price per -
Azomite Micronized (44 lb)
Regular price $27.99Sale $27.99Unit price per -
Diamond K Solution Grade Gypsum (50 lb)
Regular price $17.99Sale $17.99Unit price per -
Azomite - Micronized (2 lb)
Regular price $9.99Sale $9.99Unit price per -
Soil Conscious Glacial Rock Dust - 50 lb - Organic
Regular price $30.99Sale $30.99Unit price per -
Langbeinite 0-0-22 Fertilizer (5 lb box)
Regular price $16.99Sale $16.99Unit price per -
Ultra Bloom 0-10-10 (15 lb bag)
Regular price $36.99Sale $36.99Unit price per -
Soil Sulfur (5 lb)
Regular price $12.99Sale $12.99Unit price per -
Sulfate of Potash Ultrafines - Diamond K Soluble 0-0-50 (50 lb)
Regular price $49.99Sale $49.99Unit price per -
Organic Sulfur 90% (Granular) 50 lbs
Regular price $41.99Sale $41.99Unit price per -
Dolomite (50 lb)
Regular price $26.99Sale $26.99Unit price per -
Zinc Sulfate Powder (50 lb)
Regular price $89.99Sale $89.99Unit price per -
Manganese Sulfate 31% Powder (50 lb)
Regular price $89.99Sale $89.99Unit price per -
Garden Gypsum Prilled (5 lb box)
Regular price $11.99Sale $11.99Unit price per -
Dolomite Lime Prilled (5 lb box)
Regular price $11.99Sale $11.99Unit price per -
Diamond K Brand KMS 0-0-21.5 (50 lb)
Regular price $63.99Sale $63.99Unit price per -
Hill & Valley Fertilizer Mix Plus N 2.0-4.0-4.0 (40 lb)
Regular price $51.99Sale $51.99Unit price per -
FoxFarm Cal-Mag (1 qt)
Regular price $27.99Sale $27.99Unit price per -
Monterey Dr. Iron (7 lb)
Regular price $19.99Sale $19.99Unit price per -
Epsom Salts (50 lb)
Regular price $59.99Sale $59.99Unit price per -
Manganese Sulfate 31% Powder (5 lb bag)
Regular price $14.99Sale $14.99Unit price per -
Zinc Sulfate Powder (25 lb bag)
Regular price $54.99Sale $54.99Unit price per$0.00Regular priceQualifies for free shipping -
FoxFarm Cal-Mag (1 gal)
Regular price $83.99Sale $83.99Unit price per -
Espoma Organic Tomato-Tone 3-4-6 (8 lb)
Regular price $24.99Sale $24.99Unit price per -
Super Green Chicken Manure (2000 lb tote)
Regular price $435.00Sale $435.00Unit price per -
Peaceful Valley Organic PrimeStart Booster Blend 2.3-5.0-2.6 (3 lb Bag)
Regular price $9.99Sale $9.99Unit price per -
Peaceful Valley Organic PrimeStart Booster Blend 2.3-5.0-2.6 (30 lb)
Regular price $51.99Sale $51.99Unit price per -
Hill & Valley Fertilizer Mix 0.5-4.0-4.0 (40 lb)
Regular price $45.99Sale $45.99Unit price per -
Gaia Green Glacial Rock Dust (5 lb bag)
Regular price $14.99Sale $14.99Unit price per
Collection: Magnesium & Sulfur Fertilizers
Sulfur and Magnesium Fertilizers
Compare fertilizers and mineral amendments that supply sulfur, magnesium or both. The assortment includes elemental sulfur, sulfate minerals, gypsum, dolomite and blended products for specific crop and soil needs.
Choosing and Applying
These materials have different effects on soil pH and nutrient balance. Confirm the analysis and use soil or tissue testing before correcting a suspected deficiency.
Browse sulfur-focused products, pH-correcting products and trace minerals.