Pruning or crowning trees is the removal of old, unhealthy, drying and damaged branches, as well as branches directed towards the inside of the crown. It is necessary to stimulate the growth of new shoots, correct tree defects or remove old dangerous branches. Recently, special services have performed tree pruning in Krasnoyarsk. Now, city residents complain that only trunks remain instead of bushes and trees. Maria Kirienko, Candidate of Biological Sciences, Senior Researcher at the V.N. Sukachev Institute of Forest told in the program of the channel Prima TV why trimming trees in Krasnoyarsk requires an urgent revision, and which trees should not be pruned under any circumstances.