Аннотация
The article presents the results of the development of a technique for obtaining aseptic seedlings of Thuja occi dentalis L.landscape culture in vitro conditions. Sterilizers and the method of sterilization were chosen taking into account the biology of seed germination. The results of the effect of hormone concentration on the growth and development of Thuja occidentalis L. shoots in various nutrient media are presented. Plants regenerants after full development were moved to a closed ground for further observations.