CORN STARCH.
365 days.
Corn starch, cornstarch, cornflour or maize starch or maize is the starch derived from the corn grain or wheat. The starch is obtained from the endosperm of the kernel.
FLOUR.
240 days.
Flour is a powder made by grinding raw grains or roots and used to make many different foods. Cereal flour is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history.