PLANT AND ANIMAL TISSUES ARE SIMILAR. TWO ANIMAL HORRMONES (ETHINYL ESTRADIOL AND LYNESTRENOL) WERE ADDED AT DIFFERENT CONCENTRATIONS TO THE DRENCHING SOLUTION WITH THE FERTILIZING MIXTURE 23:20:20:2 , TO EXAMINE THEIR EFFECTS ON GROWTH AND DEVELOPMENT OF POTHOS PLANT. STATISTICAL ANALYSIS OF THE RESULTS REVEALED A CLEAR RESPONSE IN THE FORM OF CONSIDERABLE ENHANCEMENT OF PLANT HEIGHT, AS WELL AS LEAF AND STEM PARAMETERS. THE BEST ENHANCING EFFECTS WERE RECORDED WITH THE MIXTURE CONTAINING ESTROGEN IN THE FORM OF ETHINYL ESTRADIOL AT 0.1 PPM. IT CAN BE CONCLUDED THAT ESTROGEN MAY REPRESENT A BIOLOGICAL ENHANCING GROWTH REGULATOR FOR ORNAMENTAL PLANTS