Place in a light, warm, well-ventilated place for several weeks to cure. This eliminates excess moisture thus reducing the chances of rot. After corms are stored, separate the new corm from the old one by snapping them apart. Remove the loose husks, leave the wrapper husks intact. Also remove the small cormels and place them in a labeled paper bag for winter storage.
Dust corms with insecticide before storing.
Place them in trays, paper bags, mesh onion bags, or even old nylon stockings for storage. Keep the varieties separated since they multiply at different rates. Light colors are more vigorous and multiply faster than darker colors. The major insect pest of gladiolus is the gladiolus thrip. The foliage will be covered with whitish streaks, while the florets may appear discolored, misshapen and often unable to open.