132 FAMILIAR GARDEN FLOWERS. 



When kept under glass during the summer, the petunia 

 soon becomes infested with green-fly, the only mode of 

 removing which is to fumigate with tobacco smoke at 

 night, when the plants are quite dry, and early the next 

 day to give them a slight cleansing shower of clean water 

 with the syringe. All plants that are nearly hardy will 

 thrive better in frames than in greenhouses from Mav to 

 October, as they can be fully exposed to light, air, and 

 dew, and may be protected at any time from storm and 

 frost. 



