Orchid Diseases 291 



Culture of Cattleya 



These plants require perfect drainage conditions. 

 They thrive best in osmunda fiber pots. On a com- 

 mercial scale, it is not desirable to cover the plants 

 with moss as this usually harbors slugs which are 

 fond of the blossoms. Cattleyas require frequent 

 syringing with the hose. The temperature required 

 is the same as that for Calanthe. After flowering 

 the pseudobulbs need a rest. In this case they re- 

 quire enough water to prevent them from drying. 

 Cattleyae thrive best when grown near the glass. 



Culture of Ccelogyne 



The cultural requirements are the same as for 

 Cattleyse, the pot culture, however, being preferred. 

 The plants are heavy feeders, hence weak manure 

 water may be applied once every week during the 

 growing season. After flowering the plants are re- 

 potted and kept in a cool house until about Sep- 

 tember. 



Culture of Cypripedia 



These plants require no rest period, hence may 

 be grown the year round. They require a winter 

 night temperature of 60 to 65 degrees F. and a 

 day temperature of about 70 degrees F. As spring 

 approaches a higher temperature may be given, and 

 the glass lightly shaded. However, in the winter 

 the plants require the full sunlight. 



