l68 GARDEN PLANNING 



the gravel floor of the rock garden may be laid 

 in the way directed for path making. 



I need hardly warn the reader against the 

 use of water-worn rock pieces which have a 

 uniform pebble-like shape. I have seen them 

 used, but only with grotesque effect. On the 

 other hand, a few rounded pebbles introduced 

 along the margin of the rock structure are not 

 out of place, suggesting, as they do, an old 

 water-course, and serving to retain soil washed 

 down from the higher levels. 



Planting — No special directions are needed for 

 the practical work of putting the plants into the 

 soil. It should be done in the same way as when 

 planting a bed or border, and at the same sea- 

 sons according to locality. The mode of con- 

 struction I have described ensures that there is 

 ample depth of soil. 



Discrimination should be used in selecting 

 the plants for special positions. The smaller 

 subjects like sedum, saxifrage, and semper- 

 vivum will thrive when rooted in crannies, 

 and some on the porous surface of the rock 

 itself, as witness the common house-leek. A 

 few of these plants may be established at the 

 margin of the rockwork and allowed to 



