This invention relates to an adjuvant for agrochemicals, i.e. for plant protection products, biostimulators, fertilisers, etc., for soil or foliar applied agrochemicals, characterised in that it contains a mixture of paraffin oil with plant oil and/or alkyl ester of fatty acids of plant origin and an emulsifying-wetting component which is a multicomponent mixture of surfactants which contains ethoxylated coconut alkyldimethylamine, ethoxylated castor oil, C16-18 ethoxylated alkyl amines and surfactants of polymer nature, such as phosphate diethanolamine salts of C12-4 polyethoxylated alcohol, C9-11 linear and branched ethoxylated alcohols and sodium salt of succinic acid monoester of oxethylated nonylphenol.