STUDY OF IRIS SIBIRICA CULTIVARS’S ORNAMENTALITY UNDER THE CONDITIONS OF HUMID SUBTROPICS OF RUSSIA

The introduction work includes the study of cultivars and the selection of promising assortments. In recent years, there has been an increasing interest in beardless irises, which include Iris sibirica. The studies were carried out on the experimental base of FRC SSC RAS in 2018–2020, on Iris sibirica collection, applying the developed methodology. As a result of the observations, the criteria for assessing ornamental qualities, which are the most important in landscaping, were refined, and the assessment cards were tested. The ornamentality of the studied I. sibirica cultivars and hybrids was evaluated. The following cultivars with high ornamental scores were identified: ‘Double Standards’ – 58.18, ‘Kita-No-Seiza’ – 58.09, ‘Biyskiye perecaty’ – 56.64, ‘Lemon Veil’ – 56.91, ‘King of Kings’ – 55.88.