BULBS FOR WINTER FLOWERING. 



181 



To get this high "bottom heat" in the sand of the 

 bench, it will require, if heated by hot water, three 

 four-inch pipes under a bench three or four feet wide, 

 " boxed in " so as to confine the heat ; if by steam, an 



Fig. 42. LILT OF THE VALLEY. 



equivalent of steam pipes say, three one and a half- 

 inch pipes. 



When the flowers begin to develop, withhold water 

 overhead, as otherwise it will injure the flowers. Like 

 all other plants used for winter forcing, Lily-of-the- 

 Valley should be brought into the house in lots for succes- 

 sion. It requires, when taken from the open ground to 

 the forcing house from two to three weeks for a full 



