surface cells have lost their sap. It can be controlled by syringing the 
undersides with a strong stream of water or by spraying with the organic 
Phosphate sprays such as Vapotone XX. Care must be taken in using 
these sprays, however. There are few rot and virus diseases found on 
Cymbidiums. The spread of these diseases can be controlled by proper 
precautionary measures such as sterilizing cutting tools and keeping 
the plants in good health. 
FERTILIZING — Whether or not to apply fertilizer is another much 
discussed and controversial subject. We believe that a compost such 
as has been recommended contains sufficient plant food to last over the 
periods between repotting. However, if it is decided to use a fertilizer, 
it should have an acid reaction. If a commercial fertilizer is used, it 
should be applied at about one-third the strength recommended for 
other plants. Orchids will not tolerate a strong fertilizing program. 
Some growers use a weak solution of liquid manure. An application 
about once a month or every six weeks during the growing season is 
sufficient. 
SEEDLINGS — The culture of seedlings differs from that of mature 
plants in the respect that the main thing we desire here is vegetative 
growth. They prefer conditions favorable to Cattleya seedlings or even 
Phalaenopsis house conditions. Never let them run dry at the roots. 
They prefer quite heavy shading and must be watched very carefully 
for Red Spider. Thousands of people are successfully raising Cym- 
bidium seedlings in the country today and if the few needs they require 
are met, success is assured for anyone. 
An attempt has not been made to cover the field completely, but to give 
a few of the basic procedures in the general culture of these plants. It must be 
understood that culture may vary greatly according to locality. Good common 
growing sense is always a valuable asset. If you are in a locality where others 
are growing Cymbidiums, find a grower who is doing a good job and have him 
guide you where ever possible. Always bear in mind, too, that there is no short 
cut to good culture. You will get from your plants just what you give them in 
good care. 
