The present invention relates to coated inert granules whose coating comprises at least one polymer, at least one agriculturally active ingredient and at least one dispersant. It also relates to a process for preparation of said granules comprising the steps (1) treating at least onepolymer, at least one agriculturally active ingredient and at least one dispersant with water, (2) treating inert granules with the aqueous composition of step (1), and (3) drying the composition of step (2). The present invention also relates to a method of combating harmful insects, phytopathogenic fungi and controlling undesired vegetation with said granules.