Sub-Irrigation 



will even extend duwn throui^h the crevices of the brick or tile, freciucntly 

 partialh tilling- the water canals. It would seem to be unnecessary to state 

 that a sub-irrii;ation bench should not be intrusted to the care of a novice 

 in o-rowino^ carnations, but should always be in charge of some skilled 

 grower who has had experieiice and practice in its management. 



When sub-irrigation was first broached to carnation growers it was 

 thought by some that it would prove a preventive of all diseases, and that 



Section of Sub-Irrigation Bench 



Showing Carnations growing' under Sub-Irrigation treatment— Note how roots 



extend through soil to floor of bench and crawl over bench floor 



we would not be troubled with such insects as red spider; but this has not 

 been proved by actual use, for red spider, once introduced upon plants in 

 a sub-irrigation bench, propagates there the same as upon those grown 

 upon other types of benches. But it may be said in favor of the sub- 

 irrigation bench that plants growing thereon are in a stronger, more healthful 



173 



