W 



GREENHOUSE MANAGEMENT. 



around which a wider and deeper one is placed. If the 

 space between the frames is packed with horse manure, 

 and the outer frame banked up with the same material, 

 double sash, mats and shutters will keep out frost, 

 except in very severe weather, and a fair crop can in 

 this way be obtained. 



VIOLET HOUSES. 



"While for the successful growing of violets certain 

 requirements must be observed, the form of the house 

 seems to be of less importance than with many other 



FIG. 22. NARROW VIOLET HOUSE. 



plant3. Good results can be obtained in lean-to, even- 

 span or three-quarter span houses, but, as a rule, if a 

 house is to be constructed especially for this crop, an 

 even-span house will generally be preferred. The prin- 

 cipal objection to the three-quarter span house is the 

 amount of strong sunlight that the plants are subjected 

 to, owing to the exposure to the south. This can to some 

 extent be corrected by good ventilation, and the form of 

 house has the further advantage of being more generally 

 adapted to other crops, in case the culture of the violet 

 should at any time be given up. 



