212 Growing Flowers 



A pit is simply a large hotbed and is constructed 

 along the same principles, except that as it is in 

 the form of a greenhouse buried under ground, 

 there need be no layers of manure. It should, 

 however, have good drainage and should have a 

 sash covering. It may be made of either concrete 

 or wood, though concrete is highly recommended 

 as it will not permit any water to ooze through the 

 earth surrounding the walls. The depth of exca- 

 vation depends upon the needs of the individual 

 who is to use it, but it should always be deep 

 enough to give good standing room. 



Whenever the weather is mild and pleasant, the 

 pit, hotbed, or greenhouse should be aired. If 

 fresh air is not given to plants, they will be likely 

 to have mildew form on them and possibly the 

 plants will rot, or damp off. 



