HOW TO POPULARISE ORCHID-GROWING. 



109 



generally have found it beneficial. I must not forget to say 

 that the cold plant-house treatment in winter is quite as satis- 

 factory as I could desire till March suns are blazing on the 

 eastern glass. A north aspect with reed blinds would no doubt 

 then be preferable ; but I wish to show it is not necessary to have 

 special houses and special aspects for these Equatorial Orchids. 



When I first began growing Orchids in this way I only put 

 out into the cold frame 



Odontoglossum crispum, 

 „ Pescatorei, 

 „ gloriosum, 

 „ hebraicum, 

 j, triumphans, 

 Rossi majus, 

 maculatum, 



and such intermediate forms as I possessed. I now place in 

 the frame such as 



Epidendrum vitellinum, 



Odontoglossum grande, 



Ada aurantiaca, 



Trichosma suavis, 



Cochlioda Noetzliana, 

 all of which enjoy their summer outing enormously, and will 

 winter in a cold house. Oncidiums I find the most intractable : 

 •they enjoy the plant-house winter quarters, but do not thrive 

 with this cold-frame and open-air treatment. They need, I 

 think, more sun and air by day, and a warmer night temperature 

 than we usually enjoy in Yorkshire. For them I have thrown 

 out a window-case opening from the plant-house, always open 

 to it, and well exposed to the eastern sun. Like the frame, the 

 bottom of this stand is cemented so as to hold water and create 

 a moist atmosphere, in spite of the abundant ventilation in the 

 plant-house. Here a few Orchids that did not like the cooler 

 treatment have done well, specially 



Oncidium Gardneri, 

 ,, Forbesi, 

 „ varicosum, 

 ,, concolor, 

 dasy style, 

 ,, cheirophorum, 



