One problem you may encounter when saving plants is tiny hitchhikers. Insects and other creatures that are now dormant outside suddenly come to life when you bring the plants inside.
Carefully spray the foliage-salvaged plants with a strong stream of water, insecticidal soap or another approved insecticide. Never save plants that are infested with whiteflies or spider mites as these will quickly spread to all of your houseplants.
Gladioli are easy to save. Dig up the plants and let them cure in a warm, dry place out of the sun. When the tops have dried, cut them off and store the corms in a mesh bag or on wire mesh trays in a frost-free location. There is no need to go to the trouble and expense of storing them in medium or special storage containers.