146 ROCK GARDENS 



they should be taken up and divided annually, 

 owing to the way they have of growing out of 

 the ground. This is especially applicable to 

 the alpine Auriculas. When the plant is lifted, 

 break off each crown or shoot, and roots will 

 be found attached to each of the pieces, which 

 will soon form a good-sized plant. 



Most of the dwarf Campanulas, such as 

 pulla^ pulloides^ Stansfieldii^ G. F. Wilson^ etc., 

 spread by means of a creeping rootstock, from 

 which pieces can easily be detached, each of 

 which will readily grow. 



The various Phloxes, and some of the 

 Dianthus family, especially suavis and ccesius^ 

 will, if closely examined, be found to have 

 made roots in places. These rooted bits 

 should be separated from the parent plant, 

 and then carefully raised with a ball of earth 

 if possible. There are, in fact, very few 

 alpine or rock plants from which rooted bits 

 cannot be obtained, which, when divided 

 and carefully potted, appear usually to gain 

 increased vigour and strength, instead of 

 suffering from the effects of the division. 



The best time to propagate in this manner 



