The invention relates to a composition for protecting an agricultural crop against external threats, such as weeds, pathogens, abiotic and biotic stresses and/or for improving the quality of the products produced by the crop, which composition comprises one or more poly-phenols and one or more other active ingredients. The other active ingredients may be natural crop protection compounds, metals, acids, all three optionally combined with each other and/or chemical. antimicrobial agents, or may be small particles of organic material, in particular of fibrous organic material, compounds that induce stress tolerance, compounds that stimulate wound repair and growth, or cellulose containing materials.
