164 PRACTICAL PLANT PROPAGATION 



is thought to be too hard for use indoors. The Manetti is not an ideal 

 stock, for although it is perpetual growing and vigorous, and responds 

 to fertilizer readily, it suckers badly Some nurserymen advise bud- 

 ding low on it because suckers rarely start from the roots but generally 

 from the crown. For Roses to be grown in greenhouses it seems the 

 best stock on account of its not needing to rest. 



Canina stock. Ganina stock is used in England, but it is not good 

 here. Many of our garden Roses imported before the establishment 

 of Quarantine 37 were often budded on Rosa canina; but they do not 

 succeed because they have a tendency to stand still in the greenhouse 

 in December to February. 



Standard or tree Roses are budded upon Ganina. Seedling Ganinas 

 have a deep root system, making them less liable to drought injury. 



Ezon Kempenaar, before the Newport Horticultural Society, Feb- 

 ruary 8, 1916, described the method of gowing R. canina stock from 

 seed as follows: 



"The ripe seed pods are collected in September; those from strong 

 shoots are best. 



"Two weeks after gathering, the pods are placed in a barrel and 

 stirred about with a stout stick until all broken up; water is added 

 which brings the refuse and infertile seeds to the surface; this is skimmed 

 off, leaving only the fertile seeds which are taken, thoroughly incor- 

 porated with sand and placed in boxes, which are then buried in the 

 open ground about 10 inches below the surface, where they remain 

 until Spring. They are then sown in beds just as soon as the ground 

 is workable About May 1 the seedlings will begin to make their 

 appearance, and as soon as large enough they are transplanted in rows 

 from 4 inches to 5 inches apart; the following Spring they are planted 

 out in nursery rows 18 inches apart with 6 inches between the plants; 

 at transplanting the tops are cut back, leaving only three or four eyes." 



Carolina stock. The Carolina Rose is a native and especially adapted 

 for low, damp ground; under ordinary conditions it suffers from drought, 

 making it useless for outdoor growing because of our hot and dry Sum- 

 mers. It is not very useful under glass because it has a period of rest. 

 It suckers badly when budded. 



Multiflora stock. R. multiflora makes an excellent stock, for it is 

 hardy, vigorous, and does not sprout from the roots. It is, however, 

 difficult to obtain and the roots are subject to attacks of the nematode 

 or eel worm. It is propagated by seeds for best results because the roots 

 go more deeply and the stock is made more drought resistant. 



Setigera stock. Writing of R. setigera, Joseph Meehan says: 



"Some of the Southern nurserymen already use it, and find it better 

 than the Manetti in their soil, and it does not sucker. It is fairly well 

 known here, and those familiar with it know what a strong, vigorous 

 grower it is. There is no question of its hardiness at all, since it is a 

 northern Rose; it propagates readily from cuttings and seeds; and 

 if one had a stock of it unsold, for grafting or budding purposes, it 

 would still be salable for planting for its beauty. Those not familiar 

 with it will have an idea of its character when told it is the parent of 

 the old climbing Rose, Prairie Queen." 



Rugosa stock. R. rugosa is commonly used for standard or tree 

 Roses. It is a rather good stock for outdoor Roses of all sorts but 

 being so thorny, it is difficult to work. 



