100 THE ORCHID REVIEW, (APRIL, 1918 
THE AMATEUR’S COLLECTION. 
By C. Atwyn HARRISON. 
CooL House. 
THE treatment required will be much the same as last month, except that 
more ventilation, shade and damping will now be necessary. On fine days 
syringe the plants overhead twice, once in the morning, and again about 
3 p.m. Usually, if the weather is mild, no fire heat is needed if the house 
has brick sides. A little top air can be given on warm nights towards the 
close of this month. During the first week it is a good plan to thoroughly 
spring clean the house, and wash stagings, pots and plants, syringing the 
first named with a solution of insecticide, especially in all the corners. 
Look over every plant individually, and tie up any growths, or flower 
spikes needing support. 
CATTLEYA HOUvusE. 
Here also, more air and water must be given, but do not shade the 
Cattleyas or Dendrobiums yet, though a shading made of flour and water, 
mixed thin, should be painted over that part of the roof glass under 
which the Cypripediums are grown. Also place here any Cattleyas or 
Dendrobiums, which are in bloom. Of the former, C. Trianz, Schroedere, 
and several hybrids are now in flower, while a grand show is being made 
by Dendrobiums nobile, n. nobilius (a fine variety of which I hope to speak 
about next month), crassinode, Wardianum, &c. From now till the end of 
October, the paths and staging of both houses should never be allowed to 
become dry. Syringe freely overhead, and water all plants in active 
growth, bud, or flower, at least every alternate day, if bright weather 
prevails. 
POTTING. 
As remarked last month, we are now approaching the season when 
active growth is everywhere apparent, and this is generally considered as 
one of the chief months for the important work of repotting. Before 
giving descriptions of the various genera and the soils best suited for them, 
I would point out that although I advocate potting such and such an 
Orchid, it should only be disturbed if a larger receptacle is needed, or if 
the compost has become decomposed. It must also be observed that 
Orchids, with few exceptions, must only be repotted when the new growths 
are about two inches long, and new roots pushing out. If any Orchids 
mentioned as being advisable to repot now, are not thus advanced, they 
must be left till later. 
ODONTOGLOssUMS. 
The majority of the winter and early spring-flowering species and 
hybrids are now ready for potting. The method for repotting holds good 
