FRAME CROPS 403 
good management it makes a profitable frame crop. 
Eggplant.—The eggplant is grown to some extent as 
a frame crop. A good hotbed or warm greenhouse is 
required to start the plants. They should be first trans- 
planted into small pots, and shifted until they are in 4 or 
5-inch pots, and thence to the frames. After the season 
is well advanced and there is no danger of chilling the 
plants, the sash may be removed. See page 365 for addi- 
tional notes. 
Kohl-rabi—Kohl-rabi is easily grown as a spring frame 
crop. The most economical use of the ground will be 
Fig. 144.—Coldframes ready for seeding in August with carrots and other fall crops. 
obtained if the plants are started in beds and then trans- 
planted into frames. (See page 366.) 
Lettuce (Fig. 139) is unquestionably the most im- 
portant frame crop. It is extensively grown in frames in 
all parts of the country. As a hotbed crop it has been 
grown from the earliest days of vegetable forcing in the 
United States. As a frame crop in the South, whether 
the frames are covered with sash or muslin, it receives 
much more attention than any other crop. In the North 
