246 



PRINCIPLES OF PLANT CULTURE 



roots resume activity, is important (235). Evergreen 

 trees and shrubs may often be shaded with barrels or 

 boxes, or with boughs from other evergreen trees. 



415. Tardy starting into growth after transplanting is 

 usually evidence that the roots are not supplying suf- 

 ficient water. In such cases, if other precautions have 

 been observed, it is well to further reduce the top. Plants 



FIG. 154. 



FIG. 155. 



FIG. 153. Potting. A poorly-potted plant. No provision is made for- 

 drainage ; the pot is filled to the top with soil, leaving no space to 

 receive the water ; and the stem of the plant is not at the center of 

 the pot. 



FIG. 154. A well-potted plant. A, potsherds; B, moss. 



FIG. 155. A poorly-shifted plant. C, open spaces due to insufficient 

 pressing of the soil. 



in this condition may sometimes be saved by wrapping 

 the stem in oiled or rubber cloth to check loss of moisture, 

 or with straw or moss which may be wet frequently till 

 growth starts. 



The device shown in Fig. 152 often causes recently- 

 planted trees to start growth that seem likely to fail 

 without it. It consists of a flask or bottle containing 

 distilled or rain water, supported a few feet above the 

 ground and connected by a rubber tube with the cut-off 



