When compiling the cadaster of the city, two years of observations on the green spaces of St. Petersburg were carried out. The main attention of the authors was paid to the English oak (summer oak) as a species with a point habitat, but widely used in the park construction of the northern capital. Suburban parks, created in the 18th century by the Russian tsars, were chosen as objects of research. These are the Pavlovsk Museum-Reserve, Babolovsky and Separate Parks in Pushkin, and the Dubki Park in Sestroretsk. The history and technology of creation of plantations, groups and solitaries are established, growth dynamics and modern successions of oak by other species are shown. Proposed measures for the care of green spaces, which will be taken into account in the future maintenance of the inventory.