LUTHER BURBANK 



its parent stock until union with the new stock 

 is completed; (3) Budding, which consists of the 

 insertion of a single bud upon the cambium layer 

 of the stock. There is no fundamental difference 

 between the three processes; they are merely 

 different methods of accomplishing the same 

 purpose. 



Grafting may be more or less successfully 

 carried on at any time of the year. But during 

 the spring and early summer months the vital 

 cambium zone is usually at the maximum of 

 activity, forming wood tissue from its inner 

 surface, and bark from its outer surface. At this 

 time of maximum growth, wounds are rapidly 

 healed, and union between a cion and stock is 

 most rapidly secured. Nurserymen and fruit 

 growers take advantage of this fact. 



The most satisfactory results almost always 

 follow spring grafting or summer budding. It is 

 necessary, however, that there should be activity 

 enough in the sap movement to form the cellular 

 connection between the stock and the bud before 

 the latter perishes from drying out; sap flow is 

 also necessary to allow the bark to be lifted 

 readily from the cambium for the insertion of 

 buds. 



The best success usually follows the grafting 

 of mature, or nearly mature, buds in the case 



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