Special Articles 77 
ticular express company or route, mark it so on the box and on your 
express receipt. 
Many small plants or cuttings are now sent out in the various 
forms of heavy corrugated paper boxes. These make neat packages and 
are a convenient method of handling small shipments. As soon as 
your signed express receipt is turned into your office, a postal card or 
other notice should be sent to the consignee to notify him the goods 
are under way. 
Vegetable Crops Under Glass 
By E. F. Stoddard, Maryland State College 
D uring the past year many florists have grown vegetable crops 
under glass. The amount of greenhouse space devoted to these 
crops is considerably larger this year. This is indicated by the 
large number of letters asking for information about vegetables under 
glass, which have been received from florists. To meet this call from 
our florist friends, this brief article has been prepared to outline some 
of the most important essentials in growing vegetables under glass, and 
to give sufficient detail to guide them in growing vegetables in their 
own houses. 
The most important vegetables that are grown in commercial green- 
houses are Lettuce, Tomatoes, Cucumbers, Radishes, Parsley, Cauli- 
flower, Asparagus, Peppers and Rhubarb. Those that require rather 
high temperatures are Tomatoes, Cucumbers and Peppers, while the 
others may be grown at much lower temperatures. This naturally 
divides them into two groups and determines largely in which seasons 
of the year they may be grown profitably. Both Fall and Spring con- 
tain the warmest months during the forcing period, during which time 
it is easier to maintain higher temperatures for Tomatoes, etc. The 
cold Winter months are selected for crops which will grow under cool 
conditions, such as Lettuce, Cauliflower and Radishes. 
Rotations 
The following plan will show how these vegetables may be arranged 
in a rotation which is used by many growers: 
1, Tomatoes, Fall crop; 2, Lettuce, Winter crop; 3, Cucumbers, 
Spring crop. 
Cucumbers are grown as a Fall crop by a few growers. In this 
rotation some men grow two crops of Lettuce before planting Cucum- 
bers. In this case, the Cucumbers mature during the late Spring and 
early Summer. When one crop of Lettuce is grown, the Cucumbers fol- 
low immediately and I.ettuce plants may be planted between the Cucum- 
bers. This half crop of Lettuce will mature before the Cucumbers need 
all the space. 
Another rotation is as follows: 1, Lettuce, Fall crop; 2, Lettuce 
and Radishes, Winter crops; 3, Tomatoes or Cucumbers, Spring crops. 
About three or four crops of Lettuce may be grown before the 
Spring crop is planted. Radishes may be grown in the Fall if desired. 
