Herbaceous Plants 305 



species are hardy and must be wintered in a cool greenhouse 

 or very dry cellar. The plants when thus set out make a 

 clean, healthy growth during the summer, and need to be 

 kept very dry during the winter. It is generally better to 

 plunge the pots rather deep in the ground than to turn 

 them out, especially if the soil is inclined to be dry. 



