THE CULTURE OF ROSES UNDER GLASS. 
129 
to fall below 45° at night. Each morning, from the time of 
pruning, the plants, pots, walls, and paths should be well 
syringed except in dull, cold weather, when it is desirable to 
withhold the syringe for a time, and later on, as brighter 
weather succeeds the dull, cloudy sky of mid-winter, it will be 
found necessary to syringe every morning about nine o'clock and 
every evening about three to four o'clock. But I am advancing 
too rapidly for the Roses, and will mention this again at the 
proper place. 
It must not be forgotten that in growing Roses under glass 
the conditions attending their culture should as nearly as possible 
correspond with the conditions of the months in which Roses 
grow and bloom in the open — that is April, May, and June — and 
thus it will be understood that it is necessary to transform 
January, February, and March into April, May, and June by 
artificial means ; and when it is known the Rose is so amenable 
to treatment under glass, and so thoroughly enjoys perfect 
immunity from cold or strong winds, it is a matter of surprise that 
the culture of this beautiful flower under glass is not more general 
and extensive. The Rose is a most interesting subject under 
glass, free from thunder-storms. May frosts, hurricanes, and 
every evil visitation of British climatic eccentricity, which causes 
so much anxiety and grief to the lover of Roses who is not in 
the happy possession of a glass-house. Then, again, it is under 
glass that artificial hybridisation can be most successfully carried 
on and the work made more interesting by being the work of one's 
own brush, and where no chance hybridisation can take place 
unless bees are admitted. 
Watering is, perhaps, the next most important subject to 
occupy our attention. Where the Roses are planted out, they 
will not require so much attention as those in pots ; in fact, they 
will be better if water be withheld from them (except that 
applied through the syringe) until they have made two or three 
inches of young growth. And on no account should newly 
planted Roses be treated to liquid manure. It is mistaken kind- 
ness on the part of the operator. Not so with established plants 
in pots. Each pot must be examined every day, and the best 
way to ascertain whether water is required or not is to tap each 
pot with a small knob stick. If it sounds hollow and empty it 
indicates want of water, but if the sound be dead and heavy it 
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