92 PLANT PROPAGATION 



ships in propagating before making roots than can imma- 

 ture wood cuttings, because they contain considerable 

 stored food, but even they should not be started in warm 

 air and cool soil. With green wood cuttings, root growth 

 must always precede leaf and stem growth or death 

 will almost alwavs result. 



FIG. 83 TWO STYLES OF COLD FRAMES 



1. Concrete walls around beds covered with sash on wooden framework. 2. 

 Board frames on ground for temporary use. 



136. Hotbed making. In making a hotbed a pit one 

 to two feet deep, six feet wide and any desired length 

 (preferably a multiple of three feet, because standard 

 hotbed sashes are 3 x 6 feet) is excavated and filled with 



