82 THE ROSE. 
quire severe pruning; those that are vigorous 
in growth should have the shoots only moder- 
ately shortened, but the branches well thinned 
out. If varieties of vigorous habit are closely 
pruned, a great growth ensues and very few 
flowers; hence it is of the utmost importance 
to know the character of the variety that is 
to be operated on. Besides pruning the 
plants in March, a summer pruning is desir- 
able with many varieties of Hybrid Perpet- 
uals, so soon as the June blossoming is over, 
in order to induce the formation of flower 
buds later in the season, 
