PLANTS VALUABLE FOR USE IN ROCK GARDENS, IN JAPANESE GARDENS, AND IN WALL CREVICES : Page 330

It is not necessary, in the development of an interesting rock gar-den, to use a large quantity of different types of plants. The successof a rock garden is dependent largely upon the ability of the designerto select proper types of plants for a specific purpose, whether the rockgarden be very small and occupying only a corner of the lawn, orwhether it be an extensive area in some wooded portion of the property.Such plants as hydrangeas, spireas, petunias, and many plants of thesetypes which the reader has often seen in rock garden work, give evi-dence immediately of the lack of knowledge of plants and of theirproper usage.