Marcu, 1910.] THE ORCHID REVIEW. 77 
CALENDAR OF OPERATIONS FOR MARCH. 
By W. C. Price, Oakdene, West Didsbury. 
THE temperatures of the different départments for the coming month should 
be as follows :— 
CyPRIPEDIUM house: Day, 68° to 73°; night, 68° ; morning, 63°. 
CATTLEYA house: Day, 65° to 70°; night, 65°; morning, 60°. 
INTERMEDIATE house: Day, 62° to 68°; night, 62°; morning, 58°. 
OponToGLossuM house: Day, 58° to 62°; night, 58°; morning, 55°. 
The month of March is, I think, the worst of the whole year for keeping 
the temperatures anything like regular, therefore the above figures must be 
taken only asa guide, and be governed according to atmospheric conditions. 
Great care should be taken in using the top ventilators, as, although the sun 
may be shining brightly, and running the thermometer up far above the 
required figure, the wind may be very cold at the same time, and if the top 
ventilators are opened will cause a very harsh condition in the house, which 
must be avoided. The fires should be kept as low as possible, but ready 
for instant use in case of a sudden change of weather, which so often 
happens this month. 
SHADING.—The blinds will now have to be in frequent use, at least we 
hope so. The sun when shining is now very powerful, and after having 
such a long spell of dull weather, the plants will quickly show ill effects if 
allowed to have too much direct sunlight. 
DamPinc.—Now that most plants are showing signs of activity, there 
_ must be an increase of moisture in the houses. The stages and floors should 
be thoroughly damped three times a day, morning, midday, and again about 
five o’clock in the afternoon. It will also be of great benefit to the plants 
if they are well sprayed overhead two or three times a day on bright days 
with clean soft water, but not later than three o’clock for the last time. On 
a dull day once, about eleven o’clock, will suffice. 
CyPRIPEDIUMS.—Most Cypripediums will now have finished flowering, 
with the exception of a few late blooming varieties, such as C. X Massai 
anum, C. X Transvaal, C. bellatulum, and others of that class. The 
grower will now be busy potting in this department, and should try to get 
it done as soon as possible, so that the plants can get well established, and 
give good flowering results in the autumn. Keep plenty of moisture around 
them, but do not give too much at the roots till they are nicely rooted. The 
later varieties must be left till after flowering before repotting. 
DeENDROBIUMS will be making their best show of bloom this month. 
Any that have passed out of flower, and are pushing new roots from the 
base of the young growth, should be repotted at once if they require it. Use 
the compost as recommended in the January Calendar. The grower must 
