406 VEGETABLE FORCING 



cauliflower, it has no equal. See Chapter XVI for cul- 

 tural notes. 



Rhubarb may be forced with success in frames heated 

 by manure or steam. If the roots are not planted until 

 early spring, no artificial system of heating will be re- 

 quired. On account of the length of the leaf stalks, it is 

 necessary to use frames deeper than those which will do 

 for lettuce and other plants that do not attain a height of 

 more than 10 inches. For cultural details, see Chapter 

 XIII. 



Spinach is easily grown in frames without any artificial 

 heat. A fall crop may be harvested, and early spring 

 cuttings may be made of plants started in the fall, or 

 perhaps from January or February sowings, depending 

 upon the severity of the climate. With proper attention 

 spinach will yield about as large returns as lettuce, and it 

 may be the means of avoiding a market glut of lettuce. 

 (See page 372.) 



Swiss chard may be sown in January in frames, or 

 started in hotbeds or greenhouses and transplanted into 

 the frames. In the milder sections of the country, pick- 

 ings may be made from frames throughout the winter. 



Turnip. The early varieties of turnips are sometimes 

 grown in coldframes, though this crop does not offer 

 special financial inducements as a forcing proposition. 

 (See page 373.) 



Witloof chicory or French endive claims attention as a 

 frame forcing crop. For further paticulars see page 373. 



