Magnesium Sulfate Epsom Salt Fertilizer | OMRI Listed
Water-soluble Magriculture Epsom salt fertilizer supplies 9.8% magnesium and 12.9% sulfur for crop nutrition, fertigation, foliar sprays, and soil programs.
Magriculture Magnesium Sulfate Heptahydrate Epsom Salt Fertilizer is an agricultural-grade, water-soluble source of magnesium and sulfur designed for professional plant nutrition programs. Formulated as magnesium sulfate heptahydrate, MgSO₄·7H₂O, this 50 lb bag provides essential secondary nutrients that support healthy crop development, chlorophyll production, photosynthesis, and balanced plant metabolism.
With a guaranteed analysis of 9.8% water-soluble magnesium and 12.9% sulfur, Magriculture Epsom Salt is a practical choice for growers who need a clean, soluble magnesium and sulfur supplement for soil, fertigation, drip irrigation, center pivot, micro-jet, foliar spray, greenhouse, hydroponic, nursery, turf, and field-crop programs. It is especially useful when soil or tissue testing indicates a magnesium or sulfur need, or when crops are grown in sandy soils, low-CEC soils, or nutrient programs with high potassium or ammonium-nitrogen levels.
Magriculture Magnesium Sulfate Heptahydrate dissolves readily in water, making it suitable for liquid feeding systems and compatible nutrient programs when used according to label directions and professional recommendations. The product is OMRI Listed for organic use and packaged in a professional 50 lb / 22.7 kg bag for farms, greenhouses, nurseries, hydroponic growers, and commercial crop operations.
Key Benefits
| Feature |
Grower Benefit |
| 9.8% Magnesium, water soluble |
Supplies available magnesium for chlorophyll formation and photosynthesis |
| 12.9% Sulfur |
Supports sulfur nutrition for plant metabolism, enzymes, and protein formation |
| Magnesium Sulfate Heptahydrate |
Classic Epsom salt fertilizer form, MgSO₄·7H₂O |
| Highly water soluble |
Works well in fertigation, foliar spray, hydroponic, and liquid-feed programs |
| OMRI Listed |
Suitable for organic production when used according to applicable restrictions |
| 50 lb professional bag |
Ideal size for farms, nurseries, greenhouses, turf managers, and commercial growers |
| Made in USA |
Produced for reliable agricultural and plant-nutrition use |
Product Specifications
| Specification |
Details |
| Product Name |
Magriculture Magnesium Sulfate Heptahydrate Epsom Salt Fertilizer |
| Brand |
Magriculture / Giles Chemical |
| Chemical Name |
Magnesium Sulfate Heptahydrate |
| Common Name |
Epsom Salt Fertilizer |
| Formula |
MgSO₄·7H₂O |
| CAS Number |
10034-99-8 |
| Net Weight |
50 lb / 22.7 kg |
| Magnesium Analysis |
9.8% Mg, minimum |
| Water-Soluble Magnesium |
9.8% Mg |
| Sulfur Analysis |
12.9% S, minimum |
| Ingredient |
Magnesium Sulfate Heptahydrate |
| Organic Use |
OMRI Listed |
| Country of Origin |
Made in USA |
| UPC |
0-62835-02250-5 |
Nutrient Content Chart
| Nutrient |
Guaranteed Analysis |
Approx. Nutrient Per 50 lb Bag |
| Magnesium, Mg |
9.8% min. |
4.9 lb Mg |
| Sulfur, S |
12.9% min. |
6.45 lb S |
Recommended Use Areas
| Application Type |
Best Fit |
| Fertigation |
Center pivot, drip/trickle, micro-jet, and liquid nutrient programs |
| Foliar Spray |
Supplemental magnesium and sulfur feeding when appropriate |
| Hydroponics |
Water-soluble nutrient programs requiring Mg and S |
| Soil Application |
Fields, gardens, turf, and crop areas with confirmed Mg or S need |
| Greenhouse & Nursery |
Controlled growing environments needing soluble secondary nutrients |
| Organic Crop Programs |
Use according to OMRI/NOP restrictions and grower certification requirements |
Best-Practice Application Guidance
Use Magriculture Magnesium Sulfate Heptahydrate as part of a complete crop nutrition program. Application rates can vary by crop, soil type, climate, irrigation method, and existing nutrient levels. For best results, base application on soil testing, tissue analysis, crop requirements, and local agricultural recommendations.
Dissolve thoroughly in water before fertigation, foliar, or hydroponic use. When combining with other fertilizers or soluble nutrients, perform a small compatibility test before mixing large batches. Store sealed in a dry area and protect from extreme temperature and humidity.
Important Note
This product is a magnesium and sulfur supplement, not a complete NPK fertilizer. It should be used when magnesium or sulfur is needed as part of a balanced fertility program. Always follow label directions and professional agronomic recommendations.
