A herbicidal composition comprising, in addition to customary inert formulation excipients, as a mixture of at least one soil-applied herbicide and a lipophilic additive consisting of a paraffin oil derived from the refined fraction of petroleum oil with a distillation range at 10 mm Hg of about 190 °C. to about 280 °C. and with a carbon number distribution from about C13 to about C55.