Flowers are lavender, blue or white, depending on species. Saffron crocus is rosy lilac with orange red threads. 5 to 6 inches Mid to late fall Well-drained soil in partial shade to full sun. Round clusters of blue or white flowers on tall stalks. Up to 40 inches July to August Full sun.
Some types are hardy.
Those that are not should be grown in containers. During the winter, take indoors and grow as a greenhouse plant. Spikes of bright red, orange or yellow flowers amid sword-shaped leaves. 24 to 36 inches tall Mid-summer Full sun, adaptable to most soils with good drainage. The blossoms are white, shaped like a gladiolus, and have a rich deep purple center.