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Proceedings of the International Plant Propagator's Society

Vol. 29

Title:
THE PRODUCTION OF RHODODENDRONS BY GRAFTING

Author:
Walter P. Miller

pp: 158-160

Abstract:
Reasons for grafting. Most rhododendrons today are produced from cuttings but there are, however, still a few cultivars that have defied the plant propagator, making them virtually impossible to root. Grafting is then essential if the cultivar or species is to be propagated.

A second reason for grafting is the widespread problem of Phytophthora which causes sudden collapse and the death of the plant. Some rootstocks are less prone to this disease, therefore, scions grafted on these stocks have an advantage when grown under less favorable conditions.

Selection of Rootstocks. The choice of a suitable rootstock is very important and like all root understocks has a definite bearing on the future success of the plants.

The four rootstocks commonly used in this country are:
     Rhododendron ponticum
     Rhododendron ‘Elegans’ (‘Roseum Elegans’? Bot. Ed.)
     Rhododendron ‘Sir Robert Peel’
     Rhododendron ‘Cunningham's White’

R. Ponticum. In England and America R. Ponticum

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