VENTILATING 6q 



them time to send down roots deeply and have promoted 

 a sturdy foundation in the plants themselves. Should 

 flower buds have prematurely appeared up to this .time 

 they will, of course, have been removed, together with 

 sub-laterals or side growths, and unnecessary leaf growth 

 and tendrils. But from the time the plants are waist high, 

 more warmth should be given, the temperature being 

 raised to 60 deg. at night with 65 deg. as the average day 

 temperature, up to 70 deg. Fahr. with sunheat. Above 

 this mark the plants are liable to be too much forced 

 and weakly. 



The Spencers enjoy a rather higher temperature than 

 the grandifloras do, for they have a more ample bloom to 

 build up, and are more sumptuous altogether in their re- 

 quirements. A healthy, buoyant, even temperature, with 

 the soft, sweet "growing feeling" about it, between 55 

 and 60 deg. Fahr., is the ideal. Above all, try to avoid 

 sudden or rapid fluctuations; it will prevent disappoint- 

 ments. 



VENTILATING 



As regards ventilation, the more nearly perfect the 

 gearing is and the larger the house, the easier it will be to 

 keep the temperature steady. Too much stress cannot 

 be laid upon the need of an even temperature, for sudden 

 drops and rises upset the condition of the plants and are 

 a fertile cause of mildew and of bud dropping. It will 

 test the skill of the grower to regulate his temperature on 

 days of cloud and sunshine, with a keen, cold wind also 

 blowing. Draughts are fatal, yet air may have to be given. 

 The best plan on such days is to keep the fires low but 

 clear, with a nice heat in the pipes, ventilate on the leeward 

 side of the house, and rather let the temperature run up to 



