How to Select and Store
Whenever possible, choose fresh sage over the dried form of the herb since it is superior in flavor. The leaves of fresh sage should look fresh and be a vibrant green-gray in color. They should be free from darks spots or yellowing.
Even through dried herbs and spices like sage are widely available in supermarkets, you may want to explore the local spice stores in your area. Oftentimes, these stores feature an expansive selection of dried herbs and spices that are of superior quality and freshness compared to those offered in regular markets. Just like with other dried spices, when purchasing dried sage, try to select organically grown sage since this will give you more assurance that it has not been irradiated (among other potential adverse effects, irradiating sage may lead to a significant decrease in its vitamin C and carotenoid content.)
To store fresh sage leaves, carefully wrap them in a damp paper towel and place inside a loosely closed plastic bag. Store in the refrigerator where it should keep fresh for several days. Dried sage should be kept in a tightly sealed glass container in a cool, dark and dry place where it will keep fresh for about six months.