MODES AND PRINCIPLES OF PROPAGATION. 45 



In filling, the earth is pounded in tightly to firm the 



cuttings, covering about one inch over the upper end of 



the root-cutting. Planted in 



this way the upper buds will 



push upward and the lower ones 



will form roots sooner on account 



)f moisture four inches below 



the surface. 



, FIG. 15. Hoot or other cut- 



Koot-cuttmgs will usually grow tings planted in trench. 



if planted wrong end up, but 



growth is retarded and not as certain as when in 

 natural position. With a lit'',b practice the one who 

 places the cuttings can tell at a glance the top end by the 

 fibres (17). 



In the South, root-cuttings are usually planted as SOOT 

 as made, but at the North it is best to start callusing anc 

 bud-development in the cellar. An outdoor dirt-covered 

 cave is best for storage, as the temperature and moisture 

 are better under control. 



Many of the roses not easy to grow from ripe or green 

 wood cuttings, such as Rosa rugosa and its hybrids, can 

 be grown from root-cuttirigs. 



Where tree-seeds are not easily obtainable, as with the 

 hackberry, trees can usually be grown from root-cuttings. 



The rose, lilac, juneberry, flowering almond, barberry, 

 and other shrubs do not sucker, but throw out subterranean 

 sprouts from the crown. Cuttings can be made from the 

 subterranean sprouts, which can be treated the same as 

 those made from surface-roots. 



51. Rooting Sprouts by Mounding. If the sprouts or 

 side shoots of cultivated trees or shrubs are cut back quite 

 low in early spring an additional number of succulent 

 sprouts will spring up. If these are carefully mounded 

 the excitable young growth will soon root and can be 



