orchids: now to grow them successfully. (Jo 



treatment of ©rcbi&5 tbrougbout 

 the ll)cai\ 



January, 



Cool House. — Temperature in the day ivith sun, 58°; in the day 

 vjithont sun, 53° : night, 50° : morning, 45°. 

 During this dark, dull uionth scarcely any potting will bo 

 required, but attention should be given to cleanKness, ventilation, 

 watering, &c. Open the bottom ventilators, more or less, in 

 accordance with the outside conditions ; and if that should be 

 damp and mild, the top ventilators may be opened a little, 

 especially on the leeward side, and a little fire heat used to temper 

 the atmosphere and promote the circulation of air. Should exces- 

 sive cold weather prevail, it wdll be best to close all the ventilators 

 and have the hot-water pipes sufficiently heated to keep the 

 thermometer at the proper degree of heat, also affording more 

 moistm-e both to the roots and in the atmosphere than is required 

 in dull, damp weather. Generally speaking, all growing plants 

 should be more sparingly watered at this season of the year. 

 Plants which are dormant (resting), such as some of the Dendrobes, 

 Coologyno, Anguloas, <S:c., may have sufficient water only tr) 

 l)revent the pseudo bulbs from shrivelling. The autumn-flowered 

 Pleiones may be repotted and suspended near the roof, giving but 

 little water at first. Examine all the plants and clean them, wash 

 their pots when wanted, look well after slugs, and if any signs 

 of thrij) should be visible — and their work may soon be detected in 

 the centre of the young gro^i;h. which then assumes a light-tinted, 

 sickly appearance and showing a small waterj^-looking mark — then 

 dust a pinch of tobacco powder well into the growth affected. 

 Thrip and slugs are especially fond of the young flower spikes and 

 buds as they appear from the sides of the pseudo bulbs, and should 

 be watched for as previously advised. 



F 



