34 GREENHOUSE MAKAGEMEKT. 



three-quarter span, with about one-third of the roof 

 upon one side of the ridge, and the remainder on the 

 other, is used, it will seldom be desirable to have the 

 house much less than twenty feet wide. 



When the flowers are desired during the fall and 

 :arly winter, it becomes necessary to plant the house 

 early in the summer; and to grow them successfully 

 during the hot weather it is desirable that provision be 

 made for the removal of part or all of the glass. Some 

 houses for this purpose have the roof formed of hotbed 

 sash, that can be quickly taken off and replaced, while 

 others have permanent sash bars, with butted glass held 

 in place with wooden caps, that permit a part of the 

 glass to be removed during the summer. Other growers 

 find it well to provide for a supply of blooms during the 

 spring and early summer, and unless the plants are 

 flowered in the beds from which chrysanthemums have 

 been removed, as mentioned in another chapter, special 

 houses will be needed. It will generally be well to get 

 them well established in the fall, and to carry then, 

 through the winter in a state of rest, at a low tempera- 

 ture. For this purjwse, a north and south even-span 

 house is desirable, and if one has an old style house with 

 small glass and heavy framework, it can be put to no 

 better use. 



If one is to build a house for carnations, it will be 

 best to construct it after some of the forms first de- 

 scribed, as, if at any time it is no longer desired for car- 

 nations, it will be well adapted to a number of other 

 crops. As the crop requires thorough ventilation, it 

 will be well to have a continuous row of ventilators in 

 the south wall, and at least one row at the ridge. 



GROWING THE PLANTS IN THE HOUSES. 



Some of the growers have adopted, with good suc- 

 cess, the plan of growing the plants during the sumraei 



