Assessment of sowing qualities of seeds and seasonal development of perennial herbal plants introduced at the Polar-Alpine Botanical Garden-Institute.

The study investigated the phenorhythms and sowing qualities of seeds from eight herbaceous perennial plant species (Arnica unalaschcensis, Aster bellidiastrum, Cirsium spinosissimum, Doronicum glaciale, Erigeron glacialis,Geum rhodopeum, G. virginianum and Rheum tataricum) introduced in Polar-Alpine Botanic Garden-Institute.Aster bellidiastrum, Doronicum glaciale, and Erigeron glacialis exhibited the earliest seed ripening, while Arnica unalaschcensis, and Rheum tataricum displayed a somewhat delayed ripening process. Notably, these species demonstrated high laboratory germination rates ranging from 92 % to 100 %, indicating their successful adaptation to the local environmental conditions. Conversely, Cirsium spinosissimum exhibited an extended period of seed maturation, with a lower germination rate of 37 %.