During the years 2007–2008 the content of flavonoids and polyphenolic acids in inflorescences of Helichrysum arenarium (L.) Moench was analyzed in specimens from natural stands and plantations. Plants cultivated in experimental plots originated from in vitro plantlets. The amount of flavonoids in inflorescences from experimental plots was higher and attained its maximum at 1.19% compared with 0.84% observed for plants from natural stands. In herbal material collected in 2008 the content of flavonoids was lower. The tendency was not observed for polyphenolic acids. Within the study period their amount ranged over the interval 0.74–2.82%. It was also found that dry mass of inflorescences from natural stands was higher than that for cultivated plants by 30.9%. In contrast, the density of generative shoots was 5.2-fold higher in natural stands. It was shown that Sandy Everlasting plantations could yield up to 3.4-fold more herbal material which is of a better quality (contains more biologically active compounds) than that from natural stands.
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