Should I cut gladiolus leaves after the flowers finish?

I have several nice rich stands of gladiolus. When the flowers are done blooming, the tall leaves start to flop over and look very messy.





Should I cut the leaves back, or tie them up so they are neater?|||You can cut them back but leave enough to keep feeding the plant for next year's blooming. I just tie mine up. Same with tulips and daffodils.