The best time to plant Nova Lux gladiolus bulbs depends on your climate and the growing season in your area. Generally, gladiolus bulbs should be planted in the spring after the danger of frost has passed and the soil has warmed up to at least 60°F (15°C). In colder regions, it may be best to wait until the soil has warmed up more or start the bulbs indoors several weeks before the last frost date.
Nova Lux gladiolus are, just like all gladiolus in general, frost hardy in USDA climate zones 7-10. If you live in one of these warmer climate zones, it is best to leave Gladiolus outside and mulch them up in the wintertime. In colder climates, you must dig them up after blooming time.