80 PLANTS FOB WINDOW GARDENING. 



the latter grow a foot or more, as E. Caffra and others. 

 The two kinds require somewhat different treatment ; the 

 former being far more difficult to manage ; they are, how- 

 ever, far more beautiful, some even dazzling from the bril- 

 liancy of their flowers. Heaths require plenty of air. If 

 crowded, they are subject to mildew; a disease much more 

 easily prevented than cured. Air should be given, if pos- 

 sible, every day ; but cold draughts should be avoided dur- 

 ing the growing season. 



Though heaths are often lost during the winter by grow- 

 ing them in too high a temperature, yet the greatest mor- 

 tality is caused by the heat of summer. With many it is 

 the custom to treat the plants as other hard-wooded plants ; 

 to turn them out doors during the summer, under the shade 

 of some tree. The consequence is, the pots are often 

 exposed to the hot sun, the tender fibrous roots become 

 parched, and the plant dies ; or else the drip from the trees 

 rots the roots, producing the like result. Our experience 

 has shown the best plan to be a different treatment for the 

 plants according to their age. Early in June, all young 

 plants should be planted out in a bed with a northern 

 exposure ; there they will grow luxuriantly during the sum- 

 mer. Before the September frosts, re-pot them with care, 



