VERTICAL CORDON APPLE TREES. 79 



For ventilation and other particulars, I refer hay 

 readers to the description of the ground vinery, pp. 

 121 to 127 ; and for the method of placing the wires, 

 to p. 75. 



I must caution those who wish to grow fruit under 

 glass fruit ridges, in small confined gardens, to be care- 

 ful as to ventilation. A single row of bricks, with 

 interstices of four inches, will not be enough ; there 

 should be two rows of bricks, one over the other, and 

 consequently two rows of interstices. Peach, necta- 

 rine, and apricot trees should be planted fourteen feet 

 apart ; but they grow rapidly, and would probably 

 soon require removing. 



It will thus be seen that to commence fruit ridge cul- 

 ture, four seven-feet lengths should be prepared, and in 

 the centre of the twenty-eight feet occupied by the ridge 

 two peach or nectarine trees may be planted. They 

 will soon form lateral cordons of great fertility, and 

 give constant employment in pinching to the amateur. 

 I must not omit to state the great advantage this mode 

 of fruit culture gives as to protection from spring frosts 

 when the trees are in bloom, or when the fruit is young. 

 Espaliers, pyramids, and wall trees are difficult to pro- 

 tect, but mats two or three thick can be piled on the 

 ridge with great facility, and loose straw or hay, the 

 best protectors possible from frost, can be strewed over 

 them thickly. 



VEETICAL COEDON APPLE TREES. 



In pp. 42 and 43 will be found the method of train- 

 ing vertical cordon pear trees. This may be applied 

 to apples on the English Paradise stock with great 



