34 TREES AND SHRUBS 



5. Margaritce, S. salicifolia, S. semperflorens, S. tomentosa, 

 and many of their varieties and hybrids. The 

 remaining Spiraeas should be kept thinned out, and 

 if any are making strong young breaks from the 

 lower part of the plant they can be cut back to 

 them after flowering. 



Stachyurus. — This should be thinned out after 

 flowering. 



Staphylea. — 5. pinnata should be kept thinned 

 in late summer ; S. colchica and S. Colombieri require 

 very little pruning, but if too tall or unshapely 

 should be cut back immediately after flowering. 



Stuartia ") „ . 



Styrax \ ^^^^^'■^ "° prunmg. 



Su^da, — Cut back occasionally to keep it from 

 getting ragged. 



Symphoricarpus. — Keep these well thinned out, 

 which should be done in late summer. 



Syringa (Lilac). — These should be kept free of 

 suckers, especially the finer-named kinds, which are 

 usually worked on stocks of the Common Lilac. 

 In addition, disbudding may be practised with ad- 

 vantage in the spring, removing the majority of 

 the blind shoots and any flowering or leading shoots 

 that are misplaced or not required. This should 

 be done twice or thrice at intervals of ten days or 

 a fortnight. 



Tamarix. — Cut back in a young state, but when 

 older they should not be pruned at all. 



Vaccinium. — ^The removal of any old or rough 

 wood is sufficient for these. 



