Archive image from page 73 of Cyclopedia of American horticulture, comprising. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches cyclopediaofamer04bail4 Year: 1900 1518 RHODODENDRON RHODODENDRON and if gentle bottom heat can be given after callusinj: it will be of advantage. They root, however, but slowly, except those of the Javanese kinds, which are mostly propagated in
Archive image from page 73 of Cyclopedia of American horticulture, comprising. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches cyclopediaofamer04bail4 Year: 1900 1518 RHODODENDRON RHODODENDRON and if gentle bottom heat can be given after callusinj: it will be of advantage. They root, however, but slowly, except those of the Javanese kinds, which are mostly propagated in this way, since they grow very readily from cuttings. Layering is sometimes practiced, especially with the dwarf and small-leaved species, but the layers usually cannot be separated until the second year. For the propagation of the numerous varieties and hybrids of hardy and half-hardy Rhododendrons graft- 2105. Azalea Sinensis, to contrast with Rhododendron. ing is most extensively employed. Rhododendron Caiaivhiense or seedlings of any of its hai'dy hybrids may be used as stock; M. maximum is also probably as good. In English and Belgian nurseries J?. Ponti- cam, which is inferior iu hardiness, is mostly employed as a stock, but this often proves fatal if the grafted plants are transferred to colder climates. JR. arboreum may be used for strong-growing varieties intended for cultivation in the greenhouse or south. Veneer- or side-grafting is mostly practiced, and sometimes cleft- and saddle-grafting (see :425). The leaves should be removed only partly and the stock not headed back until the following year. The grafting is usually done late in summer or early in spring in the green- house on potted stock without iising grafting wax. and the grafted plants kept close and shaded until the union has been completed. If large quantities are to be han- dled the plants are sometimes not potted, but taken with a sufficient ball of eartli, packed close together and cover
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