Magnesium Sulfate Fertilizer

Water-Soluble Magnesium Sulfate Fertilizer

Magnesium sulfate (MgSO4) is one of the most versatile and essential nutrients in professional horticulture — delivering both magnesium and sulfur in a single, highly soluble compound.

Why Magnesium & Sulfur Matter

  • Magnesium is the central atom in the chlorophyll molecule, driving photosynthesis and energy conversion
  • Sulfur supports enzyme activity, protein synthesis, and overall plant vigor
  • Both nutrients are rapidly depleted in sandy, low-CEC, or high-production soils

Key Features

  • Extremely high water solubility — forms true clear solutions
  • Compatible with most soluble nutrient programs (except concentrated calcium or phosphorus solutions)
  • Suitable for OMRI-certified organic programs (select grades)

Ideal Application Methods

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

Magriculture product documents

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

  • Magriculture Magnesium Sulfate 50 lb. bag. Close-up of white magnesium sulfate heptahydrate (Epsom salt) crystals on a white background.
    Magriculture Magnesium Sulfate Heptahydrate 50 lb
    Magriculture Magnesium Sulfate Heptahydrate 50 lb
    $29.71
    $29.71
    $0.59 lb
  • Magnesium sulfate 4 lb jar with new label Close-up of white magnesium sulfate heptahydrate (Epsom salt) crystals on a white background.
    Magnesium Sulfate 4 lb.
    Magnesium Sulfate 4 lb.
    $12.26
    $0.00 $12.26
    $3.07 lb
  • Magnesium sulfate 20 lb bucket with new label A pile of Magriculture magnesium sulfate heptahydrate rhombic crystals.
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 20 lb
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 20 lb
    $14.50
    $0.00 $14.50
    $0.73 lb
  • Haifa BitterMAG Epsom Salt Fertilizer for Hydroponics. Haifa BitterMAG 50 lb. bag backside
    Haifa BitterMag Magnesium Sulfate 50 lb
    Grower Price
    Haifa BitterMag Magnesium Sulfate 50 lb
    $23.36
    $45.00 $23.36
    $0.47 lb
    Grower Price
  • Magnesium sulfate 40 lb bucket with new label A pile of Magriculture magnesium sulfate heptahydrate rhombic crystals.
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 40 lb
    Magnesium Sulfate Heptahydrate (Epsom Salt) - 40 lb
    $28.15
    $0.00 $28.15
    $0.70 lb
  • 1 lb magnesium sulfate jar with borderless label Close-up of white magnesium sulfate heptahydrate (Epsom salt) crystals on a white background.
    Magnesium Sulfate 1 lb.
    Magnesium Sulfate 1 lb.
    $1.85
    $0.00 $1.85
  • K+S Magnesium Sulfate 50 lb.
    K+S Magnesium Sulfate 50 lb
    Sold out
    K+S Magnesium Sulfate 50 lb
    $36.85
    $47.25 $36.85
    Sold out
  • Penoles Magnesium Sulfate 50 lb.
    Peñoles Magnesium Sulfate 50 lb
    Grower Price
    Peñoles Magnesium Sulfate 50 lb
    $30.51
    $45.88 $30.51
    Grower Price
  • Magriculture magnesium sulfate fertilizer full pallet of 50 lb bags (epsom salt) Magriculture Magnesium Sulfate 50 lb. bag.
    Magriculture Magnesium Sulfate Full Pallet
    Grower Price
    Magriculture Magnesium Sulfate Full Pallet
    $1,383.00
    $1,469.02 $1,383.00
    Grower Price
  • Front of a Hi-Yield Magnesium Sulfate Epsom Salt 4 lb bag with green and red packaging on a white background. Back of the Hi-Yield Magnesium Sulfate 4 lb bag showing application directions and guaranteed analysis of 9.5% magnesium and 12.5% sulfur.
    Hi-Yield Magnesium Sulfate - 4 lb
    Hi-Yield Magnesium Sulfate - 4 lb
    $7.76
    $0.00 $7.76
    $1.94 lb

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