The quantitative and qualitative composition of 11 variants of the landscaping assortment of perennial herbaceous flower plants was developed in the Polar-Alpine Botanical garden-Institute. The most representative lists were in 1941 (99 species), in 2010 (109 species) and in 2020 (114 species). The proportion of early flowering species (flowering period from mid-May to late June) varied from 8 % to 20 % of the total number of species in different variants. The comparative analysis of the species diversity of early-flowering ornamental herbaceous plants showed its increase from 10 (1941 year) to 20 (2020 year) species. In the modern assortment, warm tones predominance in the color scheme (yellow-30 %, pink-crimson-25 %), which is favorable for northerners. The most resistant species (Erythronium sibiricum (Fisch. et C. А. Mey.) Kryl., Bergenia crassifolia (L.) Fritsch, Corydalis bracteata (Steph.) Pers., Viola altaica Ker-Gawl., Callianthemum angustifolium Witas., Fritillaria meleagris L.) from the first variant of the range have been preserved in the modern list.