78 LANDSCAPE-GARDENING 



include blood-roots, trilliums, adder's-tongue and 

 others which can be planted from July until the 

 end of the season. Other plants which occupy open 

 spaces and bloom later ripen and become dormant 

 at various dates until the ground freezes. 



CARE OF PLANT MATERIALS 



Valuable directions for the preparation and treat- 

 ment of the soil and the care which different plants 

 require are usually given in nursery and seed cata- 

 logues, but some additional suggestions may be 

 given here. 



When one goes to unpastured woods or looks at 

 the native growth along roadsides or old rail fences 

 or stone walls, he sees plants that have no care and 

 are generally healthy and vigorous. This condition 

 should prevail and often does exist in tree and shrub- 

 bery borders. Groups of lilacs may easily be found 

 which have received no attention for thirty or forty 

 years, and they are vigorous and each year have good- 

 sized leaves and an abundance of flowers (Fig. 15). 

 This is true also of many honeysuckles, syringas, 

 viburnums, and other shrubs, and is the ideal con- 

 dition ; but when trees and shrubs are first planted 

 they need care until they become well established. 



