46 STUDIES IN GARDENING 



fairly rich soil consisting chiefly of mortar rubble and 

 humus, and it must be watered in hot dry weather. 

 C. fragilis will do best in the narrowest chinks between 

 the rocks in a soil mainly made up of rubble. It can 

 be raised very easily from seed. C. isophylla is best 

 increased by cuttings taken in spring. Both should 

 be protected in winter if they are left out of doors. 



There are a few campanulas from the high Alps 

 which are difficult to grow. Among them C. Allioni, 

 C. cenisia, C. excisa, C. Elatines, C. lanata, and C. 

 Zoyzii. They are all purely rock plants and should 

 be grown in very narrow chinks of the rocks, in a 

 soil consisting mainly of sand and rubble, with a very 

 little leaf-mould. They are best grown from seed 

 when it can be obtained. C. Allioni spreads by means 

 of runners throwing up httle tufts, and should be 

 given some space to increase in. C. cenisia and C. 

 Zoyzii are tiny tufted plants. C. cenisia grows in its 

 native home in masses of broken shale. C. Zoyzii 

 likes a narrow fissure and does well in some gardens. 

 C. excisa is worth attempting, since it has a flower 

 both curious and beautiful and can be readily raised 

 from seed. C. lanata has a yellow flower, and very 

 little appears to be known about its culture in Eng- 

 land. It comes from the Balkans. 



All the rock campanulas are best disturbed or 

 divided in spring, as some even of the most vigorous 

 of them are apt to die in the winter if they are dis- 

 turbed in autumn. Although most of them like a 

 good deal of sun, they also like a cool place for their 



