ii6 GARDEN PROFITS 



necessity of preparing a hotbed in spring. Another 

 point is the cheaper construction of a frame of this 

 kind. If you heat your frame the walls only need 

 go about six inches below grade level; but if you 

 intend using it as a hotbed in spring, the wall 

 should go down as deep as the hotbed, which would 

 be about two and one-half feet below grade level. 



The sum and substance of the relation between 

 hotbed and coldframe is this : if you build a hotbed 

 and do not renew the source of heat (ordinarily 

 manure) it must eventually become a coldframe. 

 Now, just as truly as I have said that you cannot 

 get the maximum returns from your garden without 

 a hotbed, I will say that you cannot get the maxi- 

 mum growing season and the maximum growing 

 space without a coldframe. By a manipulation 

 of these two, closely related instruments, you prac- 

 tically double the space and efficiency of your 

 garden, while you do not increase the time, effort and 

 expense necessary for its care. We can now con- 

 sider the details of this management, in its relation 

 to the coldframe and the vegetables most adapted 

 to it. 



THE ENTIRE MANAGEMENT OF A COLDFRAME 



Coldframes can be used to good advantage for a 

 number of early vegetables. A spot that is shel- 

 tered from north and west winds and faces south 

 is preferable, in order to obtain all the sunlight. 

 A coldframe is merely a glass-covered box, higher 

 at the north end than at the south. 



