312 LUTHER BURBANK 



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 gratifying 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 

 of trees and shrubs; though young tender buds 

 often thrive nearly as well. 



THE MORE COMMON METHODS 



The best and quickest way to graft young 

 seedlings is by "side" grafting. This graft is 

 made by taking a piece of the new wood from 



