The liquid products include highly soluble micro-nutrients formulas, complexed with a natural coating agent (ammonium lignosulfonate) to make the product more stable over a wider pH range and to give a superior performance with foliar application and a greater protection of minerals when applied in fertigation. This complexing technique helps reduce solution viscosity and protects from leaf burns. It also gives good distribution of the micro-nutrients over the leaf surface without the need for additional adjuvants. If foliar application is done correctly, visual results can be quickly observed. The liquid micro-nutrients help preventing and curing multiple micro deficiencies related to the inhibition of absence of micro-nutrients. They activate the plant metabolic effectiveness to create the kind of healthy development needed in the growing season to increase yield and quality, overcoming the limitations of the soil.