144 THE ORCHID REVIEW. [May, 1923- 
CULTURAL NOTES. 
By J. CoLiier, Gardener to SIR JEREMIAH COLMAN, Bart., Gatton Park, Reigate. 
EMPERATURES.—From now onwards the conditions in each division 
must be generous and conducive to the production of strong, healthy 
growths. The temperatures for the next few months should be slightly 
raised. The following minimum readings are safe and reliable: East Indian 
house, 65° to 70°; Cattleya house, 60° to 65°; Mexican or Intermediate 
house, about 60°. At the present time and during the summer months the 
inmates of the Odontoglossum house should be kept as cool as possible. 
Endeavour to maintain a day temperature of 60° to 65°, and 55° or a little 
lower at night. Artificial heat should not be employed during the day, but 
on damp, chilly nights the hot water pipes should be slightly warmed. This 
small amount of fire-heat may be counter-balanced by opening the bottom 
ventilator a little wider, the fresh air will be beneficial to the plants, and 
will prevent the flowers from becoming spotted by condensed moisture 
settling on them. The house should be damped thoroughly three or four 
times during bright days, and the plants judiciously shaded and watered. 
Those not in flower should be sprayed overhead twice on sunny days, 
affording the last wetting sufficiently early in the afternoon for the leaves to 
become dry before night arrives. Admit air freely through the bottom 
ventilators on all favourable occasions. When the weather is warm and 
bright a rise of several degrees by sun-heat will be beneficial to the inmates 
of the warmer divisions, providing there is sufficient ventilation afforded to 
balance it. After along season of rest plants of Odontoglossum grande 
and O. Insleayi are starting into growth afresh, and just previous to their 
commencing new roots from their base should be repotted, if necessary, in 
receptacles of sufficient size to accommodate them for two seasons. Others 
that have sufficient pot-room for another year, and the compost has not 
become decayed, should be immersed in water so as to thoroughly soak the 
soil, afterwards allowing them to become dry, when portions of the. old 
materials should be picked out from between the roots on the surface, and 
replaced with new. Odontoglossum Uro-Skinneri is also pushing new roots 
from the base of the young shoots, and any needing new rooting materials 
should be given attention at this period. O. Rossii, O. Cervantesil, and 
O. Oerstedii, that have recently passed out of flower, should be suspended 
close to the roof glass, and afforded only sufficient water to prevent the 
pseudobulbs from shrivelling, as an excess of water whilst these plants are 
at rest will cause the roots to decay. 
SOPHRONITIS GRANDIFLORA.—This brilliant cool-house Orchid has been 
blooming for some time. The flowers are produced from the partly-developed 
pseudobuibs. Some are still in flower and others have passed that stage. It 
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