A product for defending and feeding plants that comprises a co-formulant and an active principle, in which the co-formulant consists of a mixture of natural mineral substances chosen from a group comprising calcite, cristobalite, muscovite/illite, magnesium pyroxene, plagioclase, quartz, sanidine, zeolite chabasite, zeolite phillipsite, zeolite clinoptilolite, and the active principle comprises copper sulphate and copper hydroxide. A method for preparing the product for defending and feeding plants comprises the following steps: - preparing a water suspension containing, the co-formulant, copper sulphate and copper hydroxide； - agitation of the water suspension and simultaneous milling of the minerals that make up the co-formulant for a time variable between 24 and 36 hours until reaching granulometry of the solid substances in the water suspension that is not greater than 30 micron； - drying and simultaneous atomising of the product； chemical/physical rebalancing of the product to environmental conditions and subsequent packaging of the product.
