140 UNIVERSITY OP CALIFORNIA EXPERIMENT STATION. 



plete unions. It is usual to attempt to regraft all the stocks which 

 fail to grow the first time. This is done the following spring at the 

 same time that the grafting of the vines which were too small the first 

 year is undertaken. 



The regrafting must be done one joint further down than the first 

 grafting, as the wood will be unhealthy, if not dead, where grafted 

 the previous year. This in most cases will bring the union below 

 the surface, with all the attendant troubles of scion roots. (See Fig. 

 27.) Unless the suckers have been allowed to grow the previous year 



FIG. 28. Herbaceous graft. 



where the grafts failed, the stocks will be weak and will not make 

 good unions. Regrafting very seldom gives a strong healthy vine,, 

 and some even of the advocates of field grafting believe it is best to> 

 dig up all the vines which fail the first year and replace them with 

 bench grafts. 



Herbaceous Grafting. Vines may be grafted during the summer 

 by using the canes or buds of the current year's growth. Numerous, 

 methods have been described for doing this, but none of them have 

 met with much success in California. A few growers, however, have- 

 successfully budded and grafted Rupestris St. George stocks during 

 the growing season, and their methods may be of use as an adjunct 

 to field grafting and to a smaller extent to bench grafting. 



