The present invention refers to fertilizing compositions comprising inorganic particles of a calcium phosphate compound substituted with micro and macro elements and surface functionalised with at least one organic compound containing at least one hydroxyl group and at least one micro or macro nutritional element and/or comprising a substituted and possibly surface functionalised calcium carbonate compound. Other aspects of the invention include a process for preparing fertilizing compositions and processes for preparing particles of calcium phosphate compound and calcium carbonate compound.
