Peculiarities of seasonal development of varieties of bearded irises (Bearded irises) at its introduc­tion in Central Botanical Garden of NAS of Belarus
The seasonal characteristics of 209 varieties of bearded irises promising in Belarus was examined. The timing and duration of flowering was determined. The studies are divided by grade timing of flowering in early, early-medium, medium, medium-later and later within the horticultural groups. It was recommended for planting different varieties of dates and duration of flowering which gives an opportunity to significantly extend the decorative effect of flower beds.