CONSTRUCTION OF COLD FRAMES 



117 



tory material for this purpose. The end boards, held in 

 place by cleats or other devices, may be removed and the 

 soil of the frame cultivated in the manner shown in Fig- 

 ures 22 and 23. The crossbars should be dovetailed in 

 the side boards so they can be removed quickly. 



While portable frames are often used, they are not 

 popular with extensive commercial growers. Portable 

 frames may be dovetailed at the corners or held together 

 by rods and bolts. They are usually made to accom- 



FIG. 25. CUCUMBERS IN COLD FRAME PLAT NEAR 

 NORFOLK, VIRGINIA 



modate either two or four 3 x 6-foot sash. A double 

 frame in use at the Missouri Experiment Station is 

 shown in Figure 24. The outside of frames when used 

 in cold weather should be banked with soil, manure or 

 sod. An excellent plan is to bank with soil and then sow 

 grass seed on the slope, unless the alleys are to be culti- 

 vated during the summer. 



167. Soil of the cold frames. When the frames are 

 used only in starting plants in flats, the character of the 

 soil is not considered. If used without flats, the greatest 



