Aim of the study was the evaluation of the accumulation and content of condensed tannins (CT) during the life cycle of sulla (Hedysarum coronarium L.). The colorimetric method 'Butanol-HCl-Fe3plus' has been used and adapted to the species. Different phenological phases have been examined separately for both components leaves and stems. A comparison was initially made between the Southern Sardinian natural population 'Villanovafranca' and the commercial variety 'Grimaldi'; other four Sardinian natural populations of sulla were also analyzed. Leaves showed a considerable higher CT content than stems. Some natural populations showed higher CT concentration than 'Grimaldi'.