Magnesium Sulfate Epsom Salt

Magnesium Sulfate Water-Soluble Fertilizer

This agricultural-grade magnesium sulfate heptahydrate (MgSO4•7H2O) is an extremely soluble and bioavailable source of magnesium and sulfur for the health of plants and animals.

Why Magnesium Matters

Magnesium is the central element in the chlorophyll molecule — essential for capturing sunlight and converting it to plant sugars via photosynthesis. It is especially critical in:

• Sandy soils and soils with low CEC
• Crops with high Mg demand
• Situations of high ammonium-N and/or potassium applications

Key Features

• Optimum solubility for true clear solutions
• Compatible with other soluble nutrients (except concentrated calcium and phosphorus solutions)
• OMRI listed — approved for use in certified organic growing as a plant or soil amendment to overcome documented magnesium deficiency

Ideal For All Fertigation Systems

• Center pivot
• Micro-jet
• Drip / trickle
• Hydroponic
• Foliar spray

Brands We Carry

We stock magnesium sulfate from leading agricultural suppliers, available in sizes from 1 lb to full pallets:

• Giles Chemical — Magriculture: OMRI certified organic magnesium sulfate heptahydrate
• Haifa — BitterMag™: Horticultural-grade magnesium sulfate
• K+S Magnesium Sulfate: Premium agricultural-grade MgSO4
• Peñoles Magnesium Sulfate: High-purity magnesium sulfate heptahydrate

Magriculture product documents

Download the documents below for Magriculture magnesium sulfate heptahydrate. These documents apply to Magriculture, not to other brands in this collection.

• Safety Data Sheet (SDS), revised August 2024 (PDF)
• Magriculture specifications, June 2020 (PDF)
• Magriculture OMRI certificate (PDF)
• CDFA product database record (PDF)