SimPro Cal-Mag

Cal-Mag Supplement is a clean, fully water-soluble calcium and magnesium additive formulated to stabilize nutrition where Ca/Mg demand is elevated. It is ideal for growers using RO or soft water, coco coir, hydroponic systems, or high-performance cultivars that require consistent mineral availability.

Compatible with all SimPro Premium All-in-One formulas, Cal-Mag Supplement supports strong tissue development, healthy metabolic function, and consistent crop performance from start to finish.

Calcium for Structure

• Supports cell wall strength and membrane integrity
  
• Improves plant rigidity and stress tolerance
  

Magnesium for Energy

• Central component of chlorophyll
  
• Drives photosynthesis and enzymatic metabolism
  

Deficiency Prevention

• Stabilizes RO/soft water programs
  
• Prevents common Ca/Mg deficiencies in coco and hydro systems
  

System-Friendly Formula

• Fully water soluble with clean dissolving
  
• Safe for reservoirs, injectors, and recirculating systems
  

SimPro Compatible

• Designed to pair seamlessly with SimPro Premium All-in-One formulas
  
• Combine with SimPro Microbes™ for improved nutrient uptake
  
• No synthetic PGRs
  

Made in the USA

• Click Here for Detailed Feed Chart
  
• Always fill the reservoir with water before adding nutrients
  
• Add Cal-Mag Supplement first, mix until fully dissolved
  
• Add base nutrients and supplements next
  
• Adjust pH last

Supplementation Use

• RO / Soft Water:
  Use per feed chart to establish a stable Ca/Mg baseline before base nutrients
  
• Coco / Hydro:
  Use every watering according to program guidance
  
• Soil / Soilless:
  Apply as needed to prevent or correct deficiencies
  Avoid over-application
  

Note: Cal-Mag Supplement increases EC — follow the feed chart and plant response5 g = 1 teaspoon = 5 milliliters