Water-soluble mineral fertilizer 100%. Directly available to plants (bioavailable), the salts used are of the highest quality on the market and of European origin. It contains no heavy metals, chloride, or sodium. The nitrogen source comes from a chemical reaction, Haber-Bosch: nitrogen is taken from the atmosphere and transformed into a water-soluble salt. Phosphorus and potassium are extracted and then treated to be bioavailable to plants. The micronutrients are chelated, directly bioavailable to plants. Water-soluble mineral fertilizers are the most efficient way to feed plants in hydroponic systems. The 1-gram sachet is sufficient for one liter of water. The resulting solution, if stored in a dark place at room temperature, can last for weeks. The fertilizer is produced by a leading European company and packaged by us in sachets for domestic use. CE fertilizer - NPK 15-7-22 - Total Nitrogen (N) 15% - 10% Nitric Nitrogen (N) - 5% Ammoniacal Nitrogen (N) - Copper (Cu) water-soluble 0.03% - Copper (Cu) chelated with EDTA 0.03% - Iron (Fe) water-soluble 0.12% - Iron (Fe) chelated with EDTA 0.12% - Manganese (Mn) water-soluble 0.05% - Phosphoric anhydride (P2O5) ammonium citrate soluble 7% - Phosphoric anhydride (P2O5) 7% - Manganese (Mn) chelated with EDTA 0.05% - Potassium oxide (K2O) water-soluble 22% - Molybdenum (Mo) water-soluble 0.005% - Boron (B) water-soluble 0.03% - Zinc (Zn) water-soluble 0.01% - Zinc (Zn) chelated with EDTA 0.1% - EDTA chelating agent - pH range ensuring good stability of the chelated fraction 4-9