HOT-BEDS. 315 



is very useful for growing violets and polyanthus for 

 early blooming, as directed in a former chapter, or for 

 protecting roses and half-hardy plants during the winter. 

 The accompanying figure may give an idea of its appear- 

 ance. 





WATERING, 



A hot-bed should be watered when the soil becomes 

 dry. The rule is, keep the soil moist but not wet. Never 

 water when the sun is on the plants, unless you water 

 only the soil, and do not allow a drop of water to 

 touch the foliage of the plants. Morning and evening 

 are the best times for watering ; but watering should 

 never be done on a cold, freezing day. The water used 

 should be of a moderate temperature ; cold, icy water 

 injures the plants, 



