A mono- and bifactorial dispersional analysis has been applied to determine the rate of influence of different factors on variability in the contents of auxins (AIA) and gibberellins (GA3) in sunflower leaves and inflorescences. It was found that environmental conditions influenced very little the contents of the studied phytohormones, the greatest influence being manifested in line MB 514 which was treated with gibberellins. Diverse affinity of organs to GA3 was established in this line, as well as different functional roles of auxins and gibberellins, correlated with spatial isolation mechanisms. The ontogenetic phase had an important role in the variability of auxin content in leaves. The genotypes´ rate is mainly significant in the gibberellins contents` variability on the inflorescence level.