Biological and ecological features of decorative trees, shrubs and grasses, which were introduced from local and foreign flora were studied under the conditions of Absheron and decorative compositions of different forms were developed by using these plants in the territory of Arboretum and Baku. It was established that the introduced plants from different countries and ornamental plants from the local flora were well adapted to the Absheron climatic conditions and they were recommended for the creation of various compositions in parks and squares. It is advisable to give trees, shrubs and herbaceous plants the superiority in the creation of original forms of compositions.