Vegetative Propagation of Deciduous Rhododendrons using Root Stimulating Agents

Z.I Smirnova,I.A Bondorina

doi:10.1051/bioconf/20213800121

Abstract

The genus Rhododendron L. is the largest in the heather family Ericaceae DC. Rhododendrons are decorative evergreen, semi-evergreen and deciduous shrubs that have gained great popularity in green building, ornamental gardening and breeding. Among all groups of rhododendrons, deciduous are the most promising for cultivation in Central Russia due to their high winter hardiness, unpretentiousness and exceptional decorative effect. The article presents the results of experiments carried out at the GBS RAS in 2017-2020 on vegetative propagation of 50 species and varieties of deciduous rhododendrons. Vegetative propagation of deciduous rhododendrons is a rather laborious long process. Cutting deciduous rhododendrons has its own nuances and is considered problematic. In this regard, the selection of optimal conditions for the propagation of rhododendrons, which can enrich the cultural flora of the North-West, central Russia, the Urals and Siberia, was the main goal of this work.

Highlights

The history of rhododendron culture dates back more than 300 years and is closely related to the history of introduction
Don (1834), deciduous and evergreen rhododendrons have been assigned to the genus Rhododendron
The objective of the work was to expand the range of varieties of deciduous rhododendrons that can successfully grow in Central Russia and be widely used in gardening and landscaping

Summary

Introduction

The history of rhododendron culture dates back more than 300 years and is closely related to the history of introduction. In nature, they are common in regions with moderate and cool climates. Only evergreen species were called rhododendrons, and deciduous species were called azaleas, and only after the publication of G. Don (1834), deciduous and evergreen rhododendrons have been assigned to the genus Rhododendron. Representatives of the genus include about 1,300 species and more than 12,000 varieties [1]

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Conclusion