On the Autumn treatment of Green-house Plants. 413 



course, proper allowance must be made for latitude, as well as 

 other local circumstances. 



After the plants are all housed, it will be necessary to ad- 

 mit all the air that possibly can be admitted by day at first, and 

 some at night when moderate, and at all times, when the weath- 

 er is favorable, to be free as practicable with air. For this 

 reason it is obvious to all that the plants being out all summer, 

 and most of them up to the first of October, and all the sea- 

 son's growth has been made out doors, being subject to the 

 same changes of temperature, &c., as the most hardy shrub, 

 that the weather must be very cold indeed, when plants in this 

 stale, at this period, can suffer from too much air; and the ob- 

 ject of being so free with air, at this season, is to keep the 

 plants as late as possible in the autumn from making fresh 

 growth in doors; for as soon as this takes place, it will then be 

 necessary to be very cautious how air is to be admitted. The 

 advantage of retarding the fall growth of green-house plants, is 

 to enable them to winter better; it being obvious, as I have 

 already stated, that this firm short jointed wood, that has been 

 made out doors, is better calculated to get through the winter, 

 as well as to produce flowers, during the winter and early 

 spring, (which they will necessarily be forced into by the arti- 

 ficial atmosphere requisite at this season,) than plants excited 

 and enfeebled by fall growth will be at the setting in of winter. 



It will be borne in mind that the above remarks have no re- 

 ference to establishments that have separate forcing depart- 

 ments, where flowers may be had at all seasons, but simply to 

 the miscellaneous collection of green-house plants, among which 

 are frequently to be found plants requiring temperature varying 

 from the hot-house down to the half hardy plant. 



One error among amateurs is, they suppose when they have 

 all those different plants in their collection, they should have 

 them all in perfection, without considering for a moment the 

 different and opposite treatment they require; whereas here, in 

 this case, they are all subject to the same temperature, &c., 

 indiscriminately, and being so, the object must be to suit the 

 whole with the least possible injury to any: in doing so, admit 

 air freely in the fall, when the plants are in a state not to suffer 

 from it; and be very cautious how air is admitted when the 

 plants are in a growing tender state in cold weather. 



A. Saul. 



Horticultural JSTurscrics, J^eioburgh, ) 

 a: F., Oct. 21, 1842. S 



