As soon as you get home from the farmer’s market, separate your radishes from the greens. Using a sturdy vegetable brush, scrub the radishes thoroughly so they are free of any sand and dirt, and rinse them thoroughly in cold water. Get either a large wide mouth glass jar, or a glass storage container. Line the bottom of the jar or container with a layer of paper towels. Put still-damp radishes on top. Put another layer of paper towel and repeat until you are out of radishes. Crunchy, fresh radishes all week (and beyond!) long.