PRUNING AND TRAINING THE PLANTS 



545 



perpendicular to each other. The canes are then either tied ' 

 or wound around these wires, or bent over and caught between 

 the canes of the next hill as desired by the grower. 



Black and Purple Raspberries, In order to prevent long, 

 slender, weak canes, which bend over or break when heavy 

 crops are borne, the new shoots of black raspberries are usually 



Fig. 230. Black raspberries with the new canes 

 tipped in the summer. 



pinched or cut off when they have reached a height of from 

 18 to 24 inches (Fig. 230) . Since the purple raspberries often 

 grow more vigorously, they are headed from 30 to 36 inches 

 high. It is necessary to go over the plantation several times 

 during early summer in order to pinch the different shoots when 

 they have reached the proper height. The shoots should not be 

 allowed to grow 4 or 5 feet before the heading back is done. 



