Levels of adaptation of woody species of Red data book of Russia in St.-Petersburg iт the age of climate change

The article shows the results of observations of rare species of dendroflora. In conditions of the changing of the climate at Saint-Petersburg there are more cases when previously hardy species become to be rotten or damaged by frosts because of the early developed spring growth. In the future the steadiness to summer heat and to fires may be of importance. The significance of long uniterrupted rows of phenological observations has been increasing. Taking in mind the warming of the climate new methods of agrotechnics should be elaborated.