The invention is directed to a seed coating composition, to a combination of said seed coating composition with one or more active ingredients, to a method for improving the bio-efficacy of an active ingredient in a seed coating, and to a coated seed.The seed coating composition of the invention comprises one or more biologically active ingredients, and further comprises- a wax and/or polymeric carbohydrate and wherein said seed coating composition has an amount of polymeric binder excluding wax and polymeric carbohydrate of 10 % or less by total weight of the wax and polymeric carbohydrate together or- a binder and wherein said seed coating composition comprises at least one vegetable oil.