The qualitative (TLC) and quantitative (colorimetry and HPLC) composition of saponins (ginsenosides) in Panax quinquefolium originating from the field cultivation in Poland was determined. The saponin content in roots of P. quinquefolium increased with the age of the plant. The largest content of ginsenosides (33-67 mg in 1 g of dry mass) was determined in roots. Especially rich in ginsenosides was a fraction of the finest tertiary roots. Also leaves contained quite high levels of these compounds (over 30 mg/g). Seeds and stems had the lowest content of studied metabolites - about 2 and about 5 mg/g, respectively, of a sum of the six saponins determined. In almost all the raw materials investigated the Re ginsenoside dominated. However, two ginsenosides, namely Re and Rb,, dominated in roots.