CalMag - Green House Powder Feeding

Pure nutrition for stronger, healthier plants

GHF CalMag delivers nitrogen, calcium, and magnesium in optimal ratios for rapid uptake and balanced growth.
It’s completely free of chlorine, sodium, and heavy metals, ensuring a clean nutrient solution for both hydroponic and soil-based cannabis cultivation.

✅ Quickly corrects Ca and Mg deficiencies
✅ Strengthens stems and improves structural integrity
✅ Boosts nutrient absorption and photosynthetic efficiency
✅ 100% soluble, ideal for soil, coco, hydro and foliar use
✅ Perfect for soft or reverse osmosis water

Professional formula of high purity

Composition:

• - Total Nitrogen (N): 13.5 %
   • Nitrate Nitrogen (N–NO₃): 13.1 %
   • Ammonium Nitrogen (N–NH₄): 0.4 %

• - Calcium Oxide (CaO): 16.7 % (water soluble)

• - Magnesium Oxide (MgO): 6.0 % (water soluble)

• - Electrical Conductivity (1 g/L): 1.2 mS/cm

Chlorine-free, sodium-free, and heavy metal-free.

Growing tips

✳️ Dissolve completely before mixing with other nutrients.
✳️ Do not mix with other calcium additives.
✳️ Measure final EC to ensure precise dosing.
✳️ For soft or RO water: 0.5 g/L (≈ 0.6 EC).
✳️ For hard water or rich soils: 0.2 g/L, 1–2 times per week.
✳️ Foliar feeding: 0.2 g/L every 10 days in case of visible deficiencies.
✳️ Switch to GHF Calcium Chelate after week 6 to reduce nitrogen while maintaining calcium supply.
✳️ Compatible with Dosatron, Netafim and other automated dosing systems (10–15 kg / 100 L stock solution).

Technical Specifications

Product Type: Soluble Ca-Mg fertilizer
Use: Deficiency corrector and nutritional supplement
Application: Soil, coco, hydroponics, irrigation, and foliar
Solubility: 100% in water
Product EC: 1.2 mS/cm (1 g/L)
Recommended pH: 5.8–6.2
Compatibility: Full range Green House Feeding
Available Formats: 500 g, 1 kg, 5 kg, 25 kg
Brand: Green House Feeding
Origin: Netherlands