480 FRITZ BAHR'S COMMERCIAL FLORICULTURE 



Fig. 244. — ^A Good Pot op Poinsbttias. Good foliage on a pot-grown Poinsettia 



is as necessary as large, weU-colored bracts. When done well, Poinsettias always 



find a ready sale at Christmas time 



critical time in Fall, when the temperature goes down overnight — 

 maybe not low enough to make you start firing, yet frequently 

 too low to suit the leaves of the Poinsettias. A night temperature 

 with a 60-deg. minimum should be maintained for the plants in 

 pots; those well established in benches can stand a few degrees 

 less. By ear y November, sometimes even before, it is always 

 wel not to apply water as it comes out of the hose, but to take the 

 chill off; apply light doses of iquid cow manure every ten days. 



Yellow foliage is usually caused either by a low temperature, 

 by keeping the plants too dry, or by lack of nourishment. When- 

 ever the plants are subjected to all three of these troubles, they may 

 not only get yellow leaves, but the latter may all drop off while 

 the bracts remain in good shape. 



