The best time to plant gladiolus is in the spring. On zones 7 through 11 the corms can be left in the ground over the winter months. In zones colder than zone 7 the corms have to be lifted, in the fall, and stored properly.
Try to plant in a location that enjoys full sun and remember to water moderately. D-day is generally regarded as a half hardy plant, so remember to protect this plant from frosts and low temperatures. D-day needs a soil ph of 6.7 to 7.0 (weakly acidic soil - neutral soil).gladiolus
1 en.wikipedia.org/wiki/Gladiolus