. The book of the garden. Gardening. 330 HARDY FRUIT GARDEN, season for apples, pears, and all similar hardy trees, in our climate. There is, however, an ex- ception to this otherwise very general rule prac- tised both in Germany and in North America, where, the stocks having been taken up in au- tumn, are kept in sheds or cellars, and grafted during the winter. The whole stock of a nur- sery may thus be done when no other work could be carried on out of doors; and when spring returns, the stocks, with their grafts tied and clayed in the usual manner, are taken out and planted. The same practi
. The book of the garden. Gardening. 330 HARDY FRUIT GARDEN, season for apples, pears, and all similar hardy trees, in our climate. There is, however, an ex- ception to this otherwise very general rule prac- tised both in Germany and in North America, where, the stocks having been taken up in au- tumn, are kept in sheds or cellars, and grafted during the winter. The whole stock of a nur- sery may thus be done when no other work could be carried on out of doors; and when spring returns, the stocks, with their grafts tied and clayed in the usual manner, are taken out and planted. The same practice is often fol- lowed in Britain in the case of roses and pears, particularly in the latter case, when root-graft- ing is employed. The vine is best grafted when in leaf; if done sooner, it is apt to bleed to the extent of preventing the union from taking place. The general rule, however, is, to let the sap in the stock be in full motion, whUe the sap in the scion is only beginning to flow at the time of operating. " This mode of reasoning," says Mr Towers, " appears to be founded upon the old theory of the exclusive agency of the as- cending sap ; and it implies that the scion is in a dry and thirsty condition, eager to imbibe the ascending fluid. The electrical theory con- siders the flow of the sap as an operation of m- duction—that the buds of the twigs are the im- mediate instruments by which that induction operates—and therefore, that just in proportion to the identity of condition subsisting between the scion and the stock, will be the speed and certaiaty with which the union between the two is effected. What experience may finally deter- mine," says this authority, "I know not; but I am prepared to say, that I have instances now before me—all of successful grafting—wherein the scions taken off the tree at the moment of ' grafting in the crown,' were more speedily knit- ted to the stock than others that had been cut off and kept in mould
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
