The article presents the results of a study of the species composition, structure, health condition, and stages of development of the plantings in the garden square near CEC «Uralets», Yekaterinburg – alley of the Palace of Sports in Yekaterinburg. This study shows that more than 56% of woody plants were Acer negundo L. and Populus balsamifera L. There were plantings in lines (20% of the area) consisting of trees of Populus and Malus genus, plantings in arrays (about 25% of the area) of Populus balsamifera L. and Fraxinus pennsylvanica Marsh. Other species were planted in groups (55% of the area). The health condition of the plantings was assessed as 2.9 (very poor). The most durable species Larix sibirica Ledeb., Quercus robur L., and Tilia cordata Mill. had the best average scores. Less durable species Prunus maackii Rupr., Pyrus ussuriensis Maxim., Malus baccata L., and Populus balsamifera L. were dying off. Planting density in mowed areas corresponded to the recommended norms, while this indicator was exceeded by an average of 25% in areas without care due to the invasion of Acer negundo L. Three stages were distinguished in the formation process of the garden square near CEC Uralets: 1) individual plots were created and natural plantations were integrated; 2) performed complete transformation of the landscape in the central part, planted ornamental plants and created a single space of the garden square; 3) decorative plantings were added to the garden square. During the reconstruction of the garden square that combines plantings of various origins and functions, step-by-step reconstruction is the most favorable – starting with less durable dying species and preserving Larix sibirica Ledeb., Quercus robur L., Tilia cordata Mill., and Betula pendula Roth.