278 
suadetl that repeated watering upon the plants is 
one great cause of the canker, especially if it is 
resorted to when the weather proves ungenial to 
the plants. The most suitable period for the ap- 
2>lication will be at the warmest part of the day, 
in the winter and early spring months, and at 
those seasons when the sun becomes more power- 
ful, early in a morning, any time from four to 
seven o’clock, and in all cases, as much as possi- 
ble, those days are to be chosen which are likely to 
be clear and warm. This will be preferable to 
watering in the evening, as far as it regai'ds the 
canker, as at the latter period the wet is allowed to 
remain too long and too abundantly on and about 
the jdants without any evaporation, which appears 
to jjromote the disease, particularly if the weather 
is cold. 
The quantity of water necessary for the plants 
cannot properly be adjusted, but I would observe, 
that when it is applied it should be used jiretty 
cojiiously, about from one and a half to two and a 
half gallons of wjxter for each light or groiqj of 
plants, when they have arrived at a bearing state. 
In cold, cloudy, and rainy weather, it should no 
be apjilied oftener than once in from two to four 
weeks ; even in summer and in hot dry weather 
twice a week will be generally sufficient. 
Proper attention should be paid in keejiing the 
glass and frames in good repair, to prevent the drip 
and beating rains entering the bed, for when the 
