LESS COMMON FLOWER PERENNIALS, THEIR USE IN CULTIVATION

Abstract

Currently, on the territory of the Stavropol Botanical garden, there are more than 300
taxons in the collection of flower and ornamental perennials, which belong to the families of
Asteraceae, Crassulaceae, Alliaceae, Brassicaceae, Ranunculaceae, etc. Plants are placed in two
zones: heliophyte – in an open sunny area; umbraticole –in a shadowed area. The purpose of
our research is to expand the range of new, less-common flowering and deciduous-ornamental
perennial herbaceous plants for the Stavropol Territory. In this paper, we present the results of
long-term research of the most popular species and cultivars of ornamental perennials, widely
used for gardening, mainly in detached houses. For the last 25 years there has been a research
of seasonal growth and development rhythms, the study of biomorphological indicators, the
resistance to adverse weather conditions, as well as to pests and diseases. As a result, it was
found out that the decorative perennials under study can be divided by phenorhythmotypes into
evergreen and vegetating plants from early spring to late autumn. According to the height,
structure of aboveground sprouts and underground roots, plants belong to different
biomorphological groups. It determines their methods of reproduction and longevity in
cultivation. The scientific research in accelerating methods of perennials reproduction had been
being conducted for a long period of time. It implies growing plants from seeds by dividing
seed blocks and rooting various types of seed piece in a shadow place. Using highly ornamental
perennials which are resistant to our climatic zone for gardening, you must take into account
our recommendations for their placement on all types of flower beds, lawns, alpine gardens,
scree gardens.