COLOUH OF WALLS. 45 



your wall or house quite ready, then pot the trees 

 till that period, and no time is lost ; at any rate, 

 a reserve of some half-dozen should always be 

 kept thus potted in case of any accident or other- 

 wise. 



Thus, if one of your trees become unsightly or 

 deformed, or refuse to progress, then remove it 

 without delay, and place one of your potted trees 

 (the most vigorous) in its place. This the amateur 

 must particularly attend to in Cordon training. 

 Trees one year old are cheap, and so are pots, and 

 there is no excuse for not having a reserve ready 

 trained on the same system to supply vacant 

 spaces. 



With respect to the colour of walls for Orchard- 

 houses (lean-to's), white is preferable to black, 

 though the latter has certain advantages, but 

 which are most attainable out of doors : I mean 

 with respect to radiation, but white is certainly 

 preferable for Cordon training, as so much of the 

 wall is covered with leaves that no burning can 

 take place. A coat of lime-wash is invaluable on 

 account of that " rubra cura" the red spider, 

 which is the pest of peach-houses, and requires to 

 be kept down by regular syringing and ventilation. 

 The white colour adds also very much to the ap- 

 pearance of a house, and if a dash of rose or pink be 

 added, the effect is considerably heightened. Then 

 with pillars of a clear blue, and ruddy gravel 

 walks between the well-kept borders, the whole 



