Water-Soluble Magnesium Fertilizers

Magnesium is the central element in the chlorophyll molecule — essential for photosynthesis, enzyme activation, and phosphorus uptake. Custom Hydro stocks a full range of water-soluble magnesium sources for professional fertigation, hydroponic, and foliar programs.

Magnesium Sources Available

  • Magnesium nitrate — highly soluble Mg with nitrate-N; ideal for hydroponics
  • Magnesium sulfate (MgSO4, epsom salt) — the most widely used Mg source for fertigation and foliar
  • Chelated magnesium (Mg-EDTA) — for foliar correction across a wide pH range

Brands We Carry

  • Magnific / Magnisal: Magnesium nitrate for hydroponics and fertigation
  • Giles Magriculture: OMRI certified organic magnesium sulfate
  • K+S: Technical grade magnesium sulfate
  • Haifa BitterMag™: Horticultural grade magnesium sulfate
  • Dissolvine / Rexolin: Chelated magnesium EDTA

Key Features

  • 100% water-soluble — compatible with all fertigation and hydroponic systems
  • Multiple Mg forms for different application methods and crop needs
  • OMRI certified organic options available
  • Chelated forms for foliar deficiency correction

Ideal Applications

  • Hydroponic nutrient solutions
  • Fertigation: drip, micro-jet, center pivot, sprinklers
  • Foliar spray programs for rapid Mg correction
  • Sandy soils and low-CEC growing media

Serving Arkansas, Kansas, Missouri and Oklahoma. Shipping Nationwide! Wholesale to the public!