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Care of Gladiolus Corms

Gladiolus plants, or "glads," are summer flowers that grow from underground bulb-like structures called corms. In most climates, dig up and store gladiolus corms during winter, and plant them outdoors in spring.
  1. Planting

    • 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.

    Digging

    • 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.

    Storing

    • 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.