Vegetative propagation of astilba varieties under the conditions of using a growth simulator

The results of the study of rooting and survival of cuttings of Arends' astilbe varieties: Herbergenite, Rosa Perle, Sister Theresa, kriemhilde, Bonreland, Astilbe japonica cv Rheinland, astilbe japonica Washington (Astilbe japonica cv Washington), astilbe rosea "Queen Alenxandra" (Astilbe x rosea cv Queen Alexandra), collections of the Botanical garden - Institute of the Volga state technological University of the Republic of Mari El, under the conditions of using a stimulant. Observations were made in 2019. The student's coefficient is calculated. The types and varieties with the best indicators of rootability are identified.