Find a site in full sun to grow your transplanted radishes. The soil should contain low amounts of nitrogen. Therefore, don't transplant radishes to areas that have recently been fertilized with fertilizers high in nitrogen.
Dig down and around the radishes, about 4 inches, to be sure you get all the roots and don't damage the radishes themselves.
Transplant the radishes so they are just as deep as they were before. Keep as much of the roots intact as possible. Plant spring radishes about one inch apart and winter radishes two to four inches apart.
Tamp down the soil lightly and water with 1 inch of water. Keep the soil moist until harvest.