The paper deals with the results of introduction studies of herbaceous perennials of the family Asteraceae Centaurea dealbata Willd., Helenium hoopesii Gray, Achillea filipendulina Lam; family Hemerocallidoideae Hemerocallis fulva L.; family Scrophulariaceae Penstemon digitalis Nutt. ex Sims in Surgut State University Botanical Garden. It has been established that their seasonal development is characterized by long vegetation; phenorithmotype has been identified as spring-summer-autumn-green,

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... th a flowering period starting in late summer and autumn periods. The quantitative determination of pigments of the introduced species leaves has been carried out by a spectrophotometric method. As a result, it has been revealed that the pigment composition of the leaves of experimental perennials indicates their relatively high physiological status, species specificity and dependence on the phase of plants vegetation. It has been noted that the content of yellow pigments during the growing season was stable and several times inferior to the level of chlorophylls. An increase in the concentration of carotenoids and flavonoids of most of the experimental plants has been observed during the formation of generative organs and fruits ripening. The data obtained highlight the relevance of analyzed species as a source of decorative perennials stable in culture, characterized with long vegetation and flowering periods.