I 
84 THE ORCHID REVIEW. [MARCH, 1923 
CUREURAL NOLES. 
By J. COLLIER, Gardener to SIR JEREMIAH COLMAN, Bart., Gatton Park, Reigate. 
ITH the advent of March we reasonably expect an increase of light 
and sunshine, and each division will require more attention in regard 
to ventilation and atmospheric moisture. This will produce gradual 
activity amongst the plants, both as regards flower and growth. Owing to 
more favourable conditions outside, the temperature of the houses may now 
range a few degrees higher all round, both night and day, than those given 
in the January number. It will now be necessary to have the blinds or 
shading on the houses fixed in their places, ready for use at any moment, 
for the sun is getting powerful. In the coolest division the temperature 
under the sun’s influence quickly rises above what is necessary for the well- 
being of the plants. The growths and leaves that are now developing are 
very tender and soon get scorched and disfigured if exposed to bright 
sunshine. Discretion must be exercised in the use of the blinds. It is. 
advisable to be on the safe side by not exposing valuable plants to the sun’s 
influence ; at the same time the blinds should not be allowed to remain 
down longer than is really necessary. 
VENTILATING. Cold winds ofttimes alternate with bursts of bright 
sunshine, the external temperatures being perhaps 40 degrees or even lower, 
under these conditions it is not advisable to admit fresh air in sufficient 
volume to keep down the temperatures. On such occasions use the blinds.. 
When the outside temperature rises to 45 degrees, the amount of ventilation 
may be increased and shade afforded with discretion. These remarks 
apply more especially to the cooler houses containing such plants as- 
Odontoglossums, Masdevallias, and cool-growing Cypripediums. The 
Cattleya and intermediate houses will only require shading for an hour or 
so during the middle of the day. Any inmates of these houses that require 
more shade should be placed at one end and be shaded independently. 
Many occupants of the East Indian house, such as Phalznopses, Bulbo- 
phyllums, Angreecums, and the warm-growing Cypripediums, will require 
protection from the sun. Bolleas, Warscewiczellas and the dwarf-growing 
Zygopetalums should be shaded at all times. 
CG@LOGYNE CRISTATA. This is the most popular species of the genus 
and may be successfully cultivated in the ordinary plant stove during the 
season of growth; a cooler structure will suffice throughout the season of 
rest. These plants are now pushing their flower spikes and should be given 
an intermediate temperature, water should be applied to the roots to assist 
their development, but care should be taken to keep the water from the 
spikes as this frequently causes them to damp off. When the flowering is 
over, the flower scapes should be removed, and any necessary re-potting. 
