Abstract
Some features of the initial stages of woody plants ontogenesis of the urban flora in Makhachkala are presented such as Padus serotina (Ehrh.) Agardh., Fraxinus lanceolata Borkh., F. americana L., Koelreuteria paniculata Laxm., Celtis glabrata Steven ex Planch., Acer pseudoplatanus L., A. platanoides L., Maclura aurantiaca Nutt., Hibiscus syriacus L., Swida australis C. A. Mey. The relationship between the dynamics of phenological phases and the degree of winter hardiness was revealed. It is shown that the end of growth activity and the transition to a dormant state before the onset of a sub-zero temperature period contributes to better stability during the winter season. A relationship was found between winter hardiness of shoots and relative growth, i.e. the stronger the annual growth was, the greater the percentage of frost-beating from the total height of the seedling was observed. The results of the experiment approve the introduction method of climatic analogues of G. Mayr.
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