56 WTNBOW GARBENING. 



When warm days occur the sashes can be uncovered, and the sun allowed to 

 shine through the glass on to the plants, but until February it is better to keep 

 them in darkness, and not admit fresh air oftener than once in two or three 

 weeks. Do it when the air is most genial, and raise the sashes only long enough 

 to inspect the plants, and if very dry give a little water. 



