130 PBACT1CAL FLOEICULTCEE. 



continue to produce sBoots and flowers in profusion 

 during any part of fall or winter, at the will of the 

 operator, proper judgment being used to prune in the 

 plants previous to the desired time of flowering. Thus, 

 if Rose-buds are wanted at the first of January, it will be 

 necessary to prune off or shorten the shoots about Novem- 

 ber 1st ; they may then be put into a temperature ranging 

 from 50 to 60, at night, with 15 higher during the day, 

 plentifully syringed, but sparingly supplied with water at 

 the roots until they begin to grow freely. In the summer 

 treatment, I have omitted to state that the plants should 

 be at all times fully exposed to the sun, but, to counteract 

 the drying up from this exposure, the pots should be 

 plunged to the rim in sawdust, refuse hops, tan bark, sand, 

 or some such material, as is most convenient. Another 

 plan that may be adopted when it is not convenient to 

 carry the Roses through the summer in pots, is to 

 lift up and pot those planted out early in the fall, say 

 by the middle of September, or, at latest, the first of 

 October ; if carefully lifted thus early, and kept from 

 wilting, they will have filled the pots with working roots 

 by November, and will make plants nearly as good for 

 forcing as those grown throughout the entire summer in 

 pots. For this purpose, two-year-old plants are much bet- 

 ter than those only one year old, as, having more fibres, 

 they more quickly form the essential " working" roots. 



In 1870 we built a green-house for roses, 300 feet long 

 and 21 feet in width, of which figure 44 is an end sec- 

 tion. It differs from that figured on page 65 in being one 

 foot wider and having the back and middle bench on the 

 same level, which we find to be of convenience in work- 

 ing, besides giving the roses a better chance to grow 

 higher. The question of the walls for such a structure as 

 this is a very important one. We find that if brick is to 

 be used for the north or back wall, it must be made 

 hollow, as a solid wall of even one foot in thickness will 



