Plant gladiolus corms in a spot that receives full sunlight, has well-draining soil and has some wind protection. Plant the corms in spring after all chance of frost has passed, planting them about 4 inches deep into the soil with the pointed ends facing up. Space multiple gladiolus corms about 4 to 6 inches apart.
If your area experiences hard freezes and frequent frosts during winter, dig up the gladiolus corms before the first frost. Carefully dig up the corm using a garden spade or trowel, and cut back the gladiolus stalk to within 1 inch of the corm. Wash off the dirt from the corm and place it in an airy spot to cure for about one or two weeks.
Remove and discard the old corm from the base, and place the new corms in a plastic mesh bag, loose-weave basket, old nylon stocking or a similar airy container. Store the gladiolus corms during winter in a well-ventilated room with air temperatures between 35 to 45 degrees Fahrenheit.