SOIL, PLANTING 19 



for roof climbers, and a little off the wall for those 

 trained against a trellis. Many plants of climbing habit 

 are frequently trained to balloon-shaped wire frames. 

 Several other designs for such trellises are also em- 

 ployed for the purpose of training such plants where 

 not wanted to grow to a considerable height, and often 

 for exhibitive purposes. 



Plants of a twining habit should have cords or wires 

 to twist round unless trained to branches. 



If careful training is desirable for outdoor climbers it 

 is even more necessary with those under glass, and care 

 must also be taken that their growth is not too thick for 

 the plants beneath those on the rafters. 



Ventilation also requires some consideration, and as a 

 planted-out climber cannot be removed to another part 

 of the house, climbing plants ought to be in such a 

 position that they will not be subjected to draughts of 

 cold wind when the ventilators are open. 



As is to be expected, climbing plants grown under 

 glass are subject to various pests, which must be dealt 

 with promptly and before they have taken possession of 

 the plants. The " stitch in time" is very essential with 

 plants which cannot be taken out of doors, and cannot be 

 dealt with except in their present position. Aphides, 

 mealy bug, scale and the other enemies of these climbers 

 must be dealt with by using the various remedies known 

 to gardeners. A foul roof plant is sure to tell badly by 

 infecting the flowers below. Fumigation ought to be 

 done on the first sign of green fly. 



In the chapters devoted to the various classes of 

 climbing plants the suitable methods of propagation for 

 each genus are stated in a brief way, for convenience, but 

 it will be advantageous to deal shortly with the general 

 modes of propagation applicable to such plants as a whole. 



Annuals are, as a matter of course, propagated from 

 seeds, and this is also a suitable and profitable manner 



