296 THE COMPLETE GARDEN 



There is a group of plants which practically require only the removal 

 of dead wood and superfluous growth. These trees and shrubs are apt 

 to be more or less injured by the operation of pruning. They normally 

 are comparatively slow growing. They have a tendency to grow in- 

 formally and to maintain the normal shape of the plant as they con- 

 tinue to increase in size. The operation of pruning does not encourage 

 a sufficient new growth and oftentimes so changes the physiological con- 

 dition of the plant that the flowering ability is impaired to a marked 

 degree during the succeeding one or two years. 



From the foregoing discussions it is evident that the operation of 

 pruning, as applied to the questions of just what shrubs to prune in 

 spring and what shrubs to prune in summer, and what shrubs should 

 never or rarely be pruned, is an important one. It is not an operation 

 the decision for doing which should be placed in the hands of any but 

 those who are skilled in the art and those who are thoroughly familiar 

 with the reasons pro and con. 



PRUNING LISTS 

 A. Shrubs Needing Complete Pruning: 

 a. Spring and early summer-flowering: 



Benzoin aestivale Forsythia (in variety) 



Spice Bush Golden Bell 



Berheris thunbergi Hamamelis virginiana 



Thunberg's Japanese Barberry Witch Hazel 



Cephalanthus occidentalis Hippophae rhamnoides 



Button Bush Sea Buckthorn 



Cercis canadensis Hydrangea arborescens 



Red-bud Wild Hydrangea 



Chionanthus virginica Kerria japonica 



White Fringe Globe-flower 



Cornus (in variety) Ligustrum (in variety) 



Dogwood Privet 



Cotoneaster (in variety) Lonicera (in variety) 



Cotoneaster Honeysuckle 



Deutzia (in variety) Philadelphus (in variety) 



Deutzia Mock Orange 



Diervilla hybrida Physocarpus opulifolius 



Hybrid Weigela Ninebark 



Dirca palustris Rhamnus cathartica 



Leather-wood Common Buckthorn 



Eleagnus angustijolia Rhodotypos kerrioides 



Russian Olive White Kerria 



Evonymus (in variety) Robinia hispida 



Burning Bush Rose Acacia 



