MONTHLY CALENDAR. 141 



366. Transplantation should therefore take place only when plants are 

 torpid, and when their respiratory organs (leaves) are absent ; or, if they 

 never lose those organs, as evergreens, only at seasons when the atmosphere 

 is periodically charged with humidity for some considerable time. 



367. Old trees, in which the roots are much injured, form new ones so 

 slowly, that they are very liable to be exhausted of sap by the absorption 

 of their very numerous young buds before new spongioles car? be formed. 



368. The amputation of all their upper extremities i^ the most probable 

 prevention of death ; but in most cases injury of their roots is without a 

 remedy. 



369. Plants in pots being so circumstanced that the spongioles are pro- 

 tected from injury, can, however, be transplanted at all seasons without 

 any dangerous consequences. 



INTRODUCTION 



TO THE 



MONTHLY CALENDAR 



Teie object of the following Calendar is to furnish, in a con- 

 densed form, monthly directions for the culture of some plants 

 not previously mentioned in this work; and also to direct the 

 reader's attention to the regular management of such plants 

 as have been heretofore treated of. In pursuit of the latter 

 object, references will be made to former pages, so as to 

 exhibit, at one view, the business of the garden in each 

 month of the year. The figures indicate the pages in which 

 farther directions may be found relative to the operations 

 referred to. 



