ASSORTMENT OF GARDEN ROSES FOR VERTICAL GARDENING IN THE HUMID SUBTROPICS OF RUSSIA

Over the past decades, a collection of garden roses has been created on the experimental base of FRC SSC of RAS, a special place in which is given to climbing cultivars. Currently, the assortment includes 28 garden forms. Scientific research is carried out according to the methodology of the state cultivar testing of agricultural crops and according to the methodology for a comprehensive assessment of the decorative nature of garden and park roses developed at the Centre. The assortment of climbing roses in the region is formed by plants that differ in the strength of growth, duration of flowering, as well as in the resistance to the main phytopathogens and phytophages in a humid subtropical climate. A wide range of plants is suitable for designing all types of supports (arched and semi-arched pergolas, garden espaliers, trellises), including retaining walls. The species and cultivars recommended for widespread use in landscaping, taking into account environmental requirements, ‘Alberic Barbier’, ‘Rosenfest’, ‘Domaine de Courson’ and Rosa bracteata, differ in colour, degree of flower doubleness, and duration of flowering. ‘Alberic Barbier’ and R. bracteata preserve foliage in winter. The climbing forms of garden roses recommended for use in gardening in limited quantities in favorable microclimatic conditions and with appropriate placement in the structure of green spaces include the main part of the Centre’s collection roses – ‘Mon Jardin et Ma Maison’, ‘Rosarium Uetersen’, ‘Elegance’, ‘Antike’, ‘Krimskoje Solnishko’, ‘Polka Babochka’, most species of roses, ‘American Pillar’, ‘Excelsa’, ‘Dortmund’, ‘Flammentanz’, ‘John Davis’, ‘Albertin’, ‘Paul’s Scarlet Climber’, ‘Michka’ and ‘Mme Jules Grave-reaux’. Due to climbing roses, it is possible to expand and make a more diverse assortment of species for vertical gardening in the region.