The aim of this paper is to identify the natural conditions (microclimatic and topoclimatic) which allow certain Siberian tree species (Pinus sibirica, Larix sibirica. Picea obovata) domesticate in a new habitat in Poland. The experiment is based on comparison between general climatic conditions in which the trees naturally grow with the conditions in the Arboretum in Rogów (Poland). Then, the reasons for the Siberian tree species' poor condition were consulted with a number of specialists: phytopathologists, a dendrologist and a plant physiologist. The next stage of the research involved examining the annual shoots' growth as well as the height of the largest individual trees in Siberia (Altai) and those in the Rogów Arboretum. Based on the results of the examination, it was assumed that the probable reason for poor adaptation of the examined trees is the duration of the vegetation season in Poland (twice as long as in Siberia), which is due to temperature sum. Moreover, it was suggested that windy areas (northern side of buildings or hills), constantly humid and with high levels of ground waters, are the best spots to plant Siberian trees.