94 ROCK GARDENS 



is well to make a drain of loose stones which 

 can run along at the back of the rocks bound- 

 ing the pathway ; this will act as a main drain, 

 and other short ones, if thought necessary, can 

 be made to lead into it. This main drain 

 should be made in the earlier stages and before 

 the good soil is filled in. 



Although drainage is so very important, 

 it is a mistake to imagine that it cannot be 

 overdone, for this is quite possible. 



The object to be attained is to direct all 

 moisture to the roots of the plants, and then 

 to remove whatever the soil cannot readily 

 absorb. If this is done the excess of 

 moisture will not lodge in the ground 

 and prove fatal to the plants. 



