This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
This mode of grafting (the greffe herbacie of the French) was known and practiced in the time of the renaisance; it was then forgotten or lost, and after. ward, in the beginning of the present century, rediscovered by Baron Tschuody, and by him made public. ' This mode of grafting belongs to the section of cleft grafting, the only difference between this and cleft grafting consisting in the one being performed on hard wood and the other on young or soft wood. In the spring, as soon as the young shoots have made about two-thirds of their growth, and can be broken like a piece of glass, is the time to perform the operation. The top of the plant to be grafted must be broken, not cut; this' indicates just where the part of the shoot is fit to be grafted. In alternate leafed plants, the stock should be split about one inch below the third leaf; the graft must be cut in the shape of a wedge, and the top of the cut put just opposite the second leaf/ and tied carefully with a piece of bast matting. A cone of paper is then put over the whole, to protect the graft from the sun and rain. If the plants operated on are in pots, it will be best to put them in a frame, well sheltered from the sun.
In about two weeks the papers should be opened at the top, and from time to time light and air admitted, to harden them off gradually. The papers may be taken away immediately after the ligatures are loosened, and the two portions of the stock above the graft severed at once.
In this way Tomatoes have been grafted upon Potatoes, Melons upon Cucumbers, Globe Artichoke upon Carduus lanceolatus, etc. I have myself grafted many thousands of hardy Azaleas upon Azalea Pontics with perfect success. All the Pines can be grafted in this way with wonderful success. M. Bois-divers, late conservatour of the forest of Fontainebleau, had many thousand Pine trees grafted every year in this way. The soil of the forest is a very poor one, consisting in great part of white sand, in which only a few dwarf trees and heath grow. The only kind of pine that will succeed in such a place is the Pinus sylvestris; all the other kinds, more valuable for their timber, can not be raised, in consequence of the aridity of the soil. Attempts made by him to graft the more useful kinds on the Pinus sylvestris were eminently successful.
[The above, though not new to some of our readers, presents some interesting facts. The grafting of herbaceous plants would afford the amateur both instruction and amusement; and the grafting of the young shoots of the Pine, etc., might no doubt be more generally practiced by nurserymen and others with decided advantage. What is here said of the Tomato, Azalea, etc., will apply equally to the Pelargonium and similar plants. - Ed].