Gladiolus looks best planted in dense groups. They propagate by corms, which are similar to bulbs in many ways. They have a bottom (basal plate) that will sprout roots - the other side, where you should see one or more growing points, should be planted up.
Gladiolus bloom for about two weeks, so many gardeners plant sections of Gladiolus at two week intervals to extend the flower season.
Cut flowers as you like, but be mindful not to cut too many leaves, as the leaves feed the new corms.
Light: Plant them in full sun, in the spring, when the soil has begun to warm.
Soil: Well-drained soil is a must, as Glads don’t like soggy feet.