hypericum perforatum (ST. JOHN’S WORT) IS PERENNIAL HERB, WHICH CONSUMED WORLDWIDE AS ITS MEDICINAL PROPERTIES. IN THIS PLANT ACHIEVING HOMOGENEITY IN PLANT MATERIAL IS ONE OF THE MOST IMPORTANT BREEDING OBJECTIVES. ONE WAY TO ACHIEVE THESE GOALS IS SOMATIC EMBRYOGENESIS. IN THIS REGARDS, PETIOLE AND LEAF EXPLANTS OF ST. JOHN’S WORT WERE CULTURED IN MS MEDIUM SUPPLEMENTED WITH DIFFERENT CONCENTRATIONS OF 2, 4-D (0, 0.5, 1 AND 2 MG/L) AND KIN (0, 0.5, 1.5 AND 2MG/L) TO PRODUCED EMBRYONIC CALLUS. AFTER 4 WEEKS, THE PRODUCED CALLUS WAS TRANSFERRED TO MS MEDIUM SUPPLEMENTED WITH NAA (0, 1 AND 2 MG/L) AND BAP (0, 1 AND 2 MG/L) FOR SOMATIC EMBRYO PRODUCTION. THE RESULTS SHOWED THAT THE HIGHEST EMBRYONIC CALLUS WERE PRODUCED WITH PETIOLE EXPLANT AT MS MEDIUM SUPPLEMENTED WITH 1MG/L 2, 4-D AND 1.5 MG/L KIN. THE HIGHEST SOMATIC EMBRYOS OBTAINED WITH PETIOLE EXPLANT IN MS MEDIUM SUPPLEMENTED WITH 1MG/L NAA AND 1 MG/L BAP.