APRIL, 1912.]} THE ORCHID REVIEW. 113 
CALENDAR OF OPERATIONS FOR APRIL. 
By J. T. Barker, The West Hill, Hessle, E. Yorks. 
THE temperatures of the different houses may now be raised five degrees 
higher than the figures given in the January number, except in the case of 
the Cool house, which should be kept as near the same figures as possible. 
As regards temperatures, no harm will occur with slight variations, but 
drastic ones are most harmful. 
WaATERING.—With the brighter days our plants will take more water, 
but it will have to be applied with discretion, and the remarks made last 
month, under this heading, still apply. 
VENTILATION, with a milder outside temperature, can be more liberal, 
and I am a firm believer in fresh air for our plants, therefore every 
opportunity should be taken of admitting it. It must, however, be done 
judiciously, and with caution. 
SHADING, during this often fickle month, will demand great attention, 
as, after the very dull and wet season which we have passed through, the 
plants will not be able to withstand much strong sunshine. They must be 
gradually inured to the increased light, so that the young leaves are capable of 
withstanding it, and so that the new growths are consolidated and 
strengthened as they are made. 
CYPRIPEDIUMS that have passed out of bloom, and require repotting, 
should be attended to as soon as possible, so that their growing season 
may not be unduly curtailed. As.soon as they are all finished, it is 
advisable to overhaul and thoroughly clean them before putting them in 
their summer quarters. Each plant should have room to develop its 
growth, as, with proper care and attention, they should not require 
overhauling again till the autumn. 
C@LOGYNE CRISTATA and its varieties which have been resting, 
according to my remarks last month, will now be making new growths and 
new roots, and, if necessary, they should be repotted. . Any plants that are 
in good condition should not be interfered with, as this Coelogyne resents 
being disturbed at the root to a very great degree, and. often suffers 
considerably. The compost I recommend for them: consists of equal 
‘portions of peat, osmunda, loam fibre, and sphagnum moss, well mixed 
together. Other species of Coelogyne which may also have attention at 
this season, should they require it, are C. flaccida, C. conferta, C. elata, 
C. speciosa, C. Micholitzii, C..corrugata, and others. The whole of these 
delight in an Intermediate house temperature, and, when well established, an 
abundant supply of water at the roots. C. Dayana, C. asperata and others 
which are showing for flower, may have more water at the root. 
CaTTLeyas, La.ias and LaiocaTTLeyas.—As these beautiful Orchids 
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