Aging a cigar serves to add robust flavor and smoothness. Usually the rule of thumb is 21 days, but some factories may leave cigars in an aging room for up to 180 days. This is required to create a nice balance, and year after year cigar makers aim for consistency and create a good blend because tobacco varies from year to year. In addition to this aging process goes into it the overall construction of the cigar that contributes to the quality of the cigar. The soil, climate, fermentation, humidity, and manufacturing process are essential and important factors in aging cigars.