158 GARDEN PLANNING 



mixture for our rock garden in which similar 

 ingredients find place. Such a mixture may 

 be made as follows : 



Good friable loam ... 6 parts 



Chips of sandstone I part 



Sand or road scrapings . . 2 parts 



Leaf mould I part 



To this may be added a moderate proportion 

 of well-decayed stable manure. The whole 

 should be well mixed and is then ready for use. 



Although the above compost will suit the 

 greater number of plants usually grown in a 

 rock garden, it is unsuitable for bog plants and 

 for those which thrive best in a calcareous 

 soil. 



To meet the needs of these it is desirable to 

 reserve a place where some peat may be intro- 

 duced for the benefit of the bog plants, and to 

 add a limy constituent to the compost (lime 

 or broken limestone) for those parts of the gar- 

 den in which it is intended to grow lime-loving 

 plants. Beyond that it is hardly feasible or 

 worth while to go in specializing the soil. 



The prepared soil must be entirely free from 

 clay, and to ensure this care should be taken 

 to obtain the proper kind of loam. 



