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.
It should be remembered that all the hardy perpetual roses, which are somewhat difficult to propagate by cuttings, can be easily and rapidly increased by grafting on small pieces of roots.
At any time when the ground is open, dig up roots of the manetti, or of the old Boursalt roses; cut them in pieces of, say, four inches long. For grafts, use well-ripened shoots of the past year's growth, cuttting them into pieces, each having three to four buds; form the lower end into a wedge or V form; then having cut a piece of root, square across the top end, split it, and while with the knife in the split holding it open, insert the wedge-shaped graft, fitting as perfectly as you can on one side, bark to bark; then withdraw the knife, and with narrow strips of cotton or linen cloth, dipped in melted grafting-wax; wrap carefully all over and around graft and root, in such manner that the graft cannot be displaced, nor moisture get within or next to the wound or cut; pack away in moist, not wet sand, covering all the graft and root. In spring, when the ground is in good working condition, set out the graft leaving the upper bud just level with the ground, and farther care is needed only to keep the ground from baking on top, or to keep the weeds down.
 
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