UOSES FUU OUTDOOll PLANTING. 69 



deaux or potassium siilpliidL' will successfully hold these 

 diseases in check on most of the varieties. 



In general, it is best for the amateur to buy his plants from 

 the nurseryman or llorist and not depend upon propagating 

 them himself. The only sure way of starting roses, except 

 those which root when layered, as some of the climbers and 

 Wichuriana, is from cuttings placed in sand in the green- 

 house and given bottom heat. A few of the hardy roses nmy 

 be started from dormant cuttings which are placed in the 

 open. In making such cuttings for outdoor setting take six- 

 inch lengths of the current season's growth and bury them 

 about eighteen inches deep in sandy soil just before the 

 ground freezes in the fall. Cover the soil above them with a 

 thick coat of leaves or straw for winter protection. When 

 spring comes, remove and plr.nt them out, leaving a single 

 bud above the surface of the ground. 



The varieties which may be gTO^^'n here are very largely 

 determined by our climatic conditions. Certain kinds of 

 roses are perfectly hardy and w'ill withstand any of our try- 

 ing winters; others are half hardy, and still others are so 

 tender that they kill during winter even though given the 

 best protection. 



In the spring of 1907 we set out at the Nebraska Experi- 

 ment Station about sixty different varieties of roses (having 

 several plants of each). The varieties were of various colors 

 and represented the different tj^pes or classes. We selected 

 those which were especially recommended and had in the lot 

 about 20 different kinds of hybrid perpetuals, 7 or 8 tea roses, 

 an equal number of hardy climbers, and 20 kinds of rugosa, 

 hybrid tea, moss and Wichuriana roses. 



These plants were greenhouse grown, but we hardened 

 them off in a cold frame for a time before planting them out- 

 doors. They received very good care during the summer fol- 

 lowing planting and were carefully mulched the first winter. 

 However, nearly all of the teas and hybrid teas were dead in 

 the spring and the remainder were killed last winter. At 



