THE ORCHID REVIEW. 117 
1894-5 frequently fell to 35° Fahr., the house being fully exposed to the 
east. Up to two years ago I grew the plant in a small stove, where it was 
exposed to the sunlight as much as possible; but not being satisfied with 
the progress it made, it was placed at the cooler part of an intermediate 
house, which was in use for exhibiting all kinds of soft-wooded plants, in- 
cluding Orchids. I find that to be well wetted with the syringe three times 
a day in summer and once in winter accords with its requirements. The 
progress made during the past two years by the plant in the intermediate 
house has been rapid, and the foliage is leathery and healthy-looking. 
Doubtless many plants of Renanthera are grown in too much heat, and if 
those gardeners who have more than one plant would try one or two in a 
temperature of 50° to 60° in winter and 70° in summer they would be well 
satisfied with the results. By the way, have any of our Orchid hybridists 
taken Renanthera and Vanda in hand? In case any of them require pollen 
masses to experiment with I should be pleased to give it—W. J. Grace, 
Bickton, Fordingbridge, in Gard. Chron., Feb. 27th, p. 134- 
CALENDAR OF OPERATIONS FOR APRIL. 
By W. H. Youne, Clare Lawn, East Sheen. 
WE may now safely assume that the rigours of winter are past, and that 
although we may, and probably shall, have cold weather, more especially 
in conjunction with piercing cold east winds, we shall also get some 
beneficent flashes of sunshine, thereby lessening the severity of the cold. 
The temperatures of the warmer houses should still be further increased, 
and air admitted more freely, yet with due caution, always considering 
the direction and force of the wind. The top ventilators will be needed 
very little yet awhile, and when they are used should be closed early, 
as indeed they all may be about half-past two, when the houses are 
damped down; again opening the bottom ventilators before leaving off 
for the day. The Cool houses should also be damped early in the 
afternoon, and again before leaving off if necessary, but the ventilators 
should always remain open, more oF less, according to the prevailing 
conditions outside. 
Shading will now be generally necessary, first on the coolest houses 
to serve the double purpose of protecting the plants from the sun, and 
to prevent, to a certain extent, an undesired rise in the temperature. 
The Warm houses containing soft-leaved subjects, such as Cypripediums, 
Phalznopses, etc., must also be shaded early in the day when the sun 
is shining, leaving those containing Cattleyas, Lzlias, Dendrobiums, 
