Magnesium Sulfate Epsom Salt – OMRI Certified Organic

OMRI Certified Organic Magnesium Sulfate (Epsom Salt) Fertilizer

This OMRI listed magnesium sulfate heptahydrate (MgSO4•7H2O) is approved for use in certified organic production as a plant or soil amendment to correct documented magnesium deficiency. Ultra-pure, highly soluble, and immediately plant-available.

What OMRI Certification Means

OMRI (Organic Materials Review Institute) listing confirms this product meets the standards of the USDA National Organic Program (NOP). It can be used in certified organic crop production when a documented soil or plant deficiency exists.

Key Features

• OMRI listed — approved for certified organic growing
• Extremely high water solubility for true clear solutions
• Provides both magnesium (Mg) and sulfur (S) in a single compound
• Compatible with most soluble nutrient programs (except concentrated calcium or phosphorus solutions)

Ideal Application Methods

• Fertigation: center pivot, drip/trickle, micro-jet
• Hydroponic nutrient solutions
• Foliar spray programs
• Soil amendment for Mg-deficient fields

Brands We Carry

• Giles Chemical — Magriculture: The leading OMRI certified organic magnesium sulfate heptahydrate, available in 50 lb bags and full pallets