316 
VEGETABLE GARDENING 
plants to grow when the leaf stalks are in darkness or 
subdued light. Growth under such conditions destroys 
the coloring matter of the leaf stems and prevents the 
formation of additional coloring matter. Any means of 
protecting the plants from light while they are growing 
will, therefore, secure light-colored stalks. Blanching 
also makes the stalks tender and crisp and improves 
the flavor. 
For many years, earth has been used most extensively 
for blanching. When blanched with soil the stalks pos- 
sess a sweet, nutty flavor that cannot be obtained by any 
other method. Earth must not be used in warm weather 
because it causes rust, hence banking does not begin 
