Water Soluble Magnesium

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