Description: Trials were carried out for improvement of seed germination of St. JohnТs Wort (Hypericum perforatum L.) based on studies of main sowing properties after treatments as follows: soaking, soaking and heating and combined seed stratification. Recommendations were made for the best pre-sowing seed treatment, 24 h soaking in cool water bath at room temperature and 7-day stratification at 0.5 рC