Izvod:The time of clones blossom depends on their biological – genetic traits and environmental conditions of which the greatest impact have climate factors. This work presents the results of a two-year study on the impact of climate factors (temperature, relative humidity of air and precipitation), the course and length of time blossom of embedded ramet from 20 clones in seed orchard of Scots pine (Pinus sylvestris L.) in the locality “Stanovi” – Doboj (central part of Bosnia and Herzegovina). Phenological observations were performed on 80 ramets where the observation of male inflorescence was done through 6 stages of development. During two years of research non significant differences were diagnosed in the beginning and the length of the phenophases of flowering among the analyzed clones. At the same time, significant differences of the observed phenomena were diagnosed between the years of monitoring (2005 and 2006), which can be attributed to the influence of fluctuations and differences in the values of air temperature, relative humidity and precipitation. However, a significant interaction “Clone x Year observations” indicates the possibility of selection of more or less adaptive clones in different climatic conditions, which is of special importance in the light of climate changes.
        Ključne riječi:vla�nost vazduha, padavine, cvjetanje, bijeli bor