‘FRAME CROPS 405 
methods as were explained for cucumbers (page 400). 
General questions relating to the forcing of muskmelons 
are discussed in Chapter XIX. 
Mustard is easily forced in frames. See page 367 for 
directions. 
Onion.—Onion sets may be forced in frames by the 
employment of methods described on page 367. 
Parsley is easily forced in frames by the use of methods 
described on page 369 for growing it in greenhouses. It 
is a profitable crop wherever good markets are available. 
Pepper.—The pepper is a satisfactory spring crop for 
frame culture. It pays well unless southern competition 
is too severe. The plants are started in pots and trans- 
ferred to the frames whenever it is possible to maintain 
proper temperatures. See page 370 for notes on culture. 
Radish.—The radish is one of the most profitable and 
satisfactory frame crops. It is easily grown and gives 
quick returns. As a companion crop with Icttuce and 
Fig. 146.—Double frames are sometimes used for forcing purposes. 
