“…During the period of work, 126 cultivars of foreign and domestic selection were tested. Currently, there are 26 cultivars of common lilac cultivars in the collection, recommended for landscaping of Siberian cities [4] The objects of research in this work were 7 cultivars of S. vulgaris common to the three mentioned collections: 'Katherine Havemeyer' (Lemoine, 1922), 'Krasavitsa Moskvy' (Kolesnikov 1947), 'Mme Lemoine' (Lemoine, 1928), 'Nadezhda' (Kolesnikov, 1968), 'Ogni Donbassa' (Rubtzov, Zhogoleva, Lyapunova, 1956), 'Olimpiada Kolesnikova' (Kolesnikov, 1941), 'Sensation' (Maarse, 1938). The studies were conducted according to generally accepted methods.…”