70 HOUSE PLANTS 



during the night or when there is frost out- 

 side, because it will at least chill, and maybe 

 kill them. 



On very cold nights move the boxes or 

 pots away from the window and put news- 

 papers in front of the glass, but leave a dead 

 air space between. 



The next consideration is fresh air; keep 

 the rooms well ventilated, /. e., have a win- 

 dow open somewhere in the room, preferably 

 on the opposite side from the plants, for 

 they cannot stand draughts. When a room 

 gets too warm and too dry, the plants trans- 

 pire an excessive amount of water — faster 

 than the roots can supply it from the soil — 

 but, worse still, the surface of the soil itself 

 is dried out, and even the pot as well. Thus 

 an irreparable injury is done before the 

 owner realizes it. 



TOO HIGH A TEMPERATURE 



When plants are grown in an abnormally 

 high temperature, with moisture, the growth 

 is forced, and, being soft, is easily injured. 

 A strong draught, even if only lo degrees 

 or 20 degrees cooler than the surrounding 

 air, will seriously chill plants in this con- 



