3 Saffron Crocus - Crocus Sativus Corms 3 Fresh Corms - 9 cm. Jumbo Size Flowers usually bloom in Late Fall and should be left undisturbed to form clumps. Each Saffron Crocus produces 3 stigmas per corm of Saffron Zones 6-9, Perennial. Saffron is the most expensive spice in the world! Sold by Marde Ross & Company, a Certified California Nursery