186 



THE GREEN-HOUSE. 



be kept during the winter either in a concealed part 

 of the green-house or in a frame or pit of similar 

 temperature, and, when spring comes, treated in all 

 respects like the seeds which vegetate the same season 

 in which they are sown. 



It may be observed here, that it is a safe plan with 

 new seeds from the Cape, Australasia, or South 

 America, to place them when sown on a heat rather 

 higher than that of the green-house ; for though the 

 plants of these and other latitudes when grown will 

 thrive very well in our green-houses, yet the seeds 

 require a greater degree of heat than is kept in such 

 structures, to excite them to vegetate. 



Subsect. 3. Propagation of Green-house Plants hy 

 Cuttings. 



Cuttings in general should be put in at as early a 

 period of the season as possible, for the same reasons 

 as are given for the early sowing of seeds, viz. that 

 the plants may be rooted, transplanted, and hardened 

 before winter. 



Cuttings of most kinds of green-house plants are 

 best put in in spring ; though some prefer the autumn 

 for coriaceous evergreen-leaved plants, as the Ca- 

 mellia and Orange. In the latter case the cuttings 

 remain in a nearly dormant state during October, No- 

 vember, and December, and are then supposed to 

 have formed a callosity at their lower ends, ready to 

 emit roots when they are put into bottom heat in 

 J anuary. 



