FRUIT GROWING UNDER GLASS 307 



do in the field — and be prompt and persistent in carry- 

 ing out the details of the work in all of its stages. A 

 little neglect or wrong treatment for even a short time 

 will result in more serious injury than in the field. 

 Too high or too low temperature for even a short time 

 at critical moments may often destroy an entire season's 

 growth, and no one should undertake the care of fruit 

 under glass unless they are so situated that attention 

 can be given to the crop by someone at any moment 

 of the day when conditions may require it. Among 

 the fruits that may be successfully grown under glass 

 are the peach, apricot, grape and strawberry. 



THE PEACH AND APRICOT 



For forcing these two fruits, very nearly the same 

 conditions are required. The most approved house for 

 this work is one with a span roof running north and 

 south. Both the curvilinear (Figure 108) and the 

 straight sash bar (Figure 109) are used, the former 

 being more ornamental, while the latter will make a 

 closer house. In the extreme Northern sections the 

 lean-to has the advantage that it can be most easily 

 heated, on account of the shelter wall on the north side. 

 The foundation should be raised above the surrounding 

 .land to insure quick surface drainage and a dry atmos- 

 phere. The trees are generally grown in borders, but 

 where space is limited they may be grown in pots or 

 tubs and stored during the winter or dormant stage in 

 close quarters in the houses, in stable cellars or in pits. 



The Borders — The borders are generally made in- 

 side, as seen in Figure 108, but may be partly outside 

 as well, as shown in Figure 109, and should be made 

 of fine, light, but moderately rich material. Decayed 

 sods, leaf mold, coarse bones, mortar waste and perhaps 

 some sand if the soil is heavy should be well mixed 

 together for this purpose. The border should be thor- 



