Replant them in soil improved with compost, bonemeal, bloodmeal and kelp. Harvesting saffron is easy. Pick off the stigmas as soon as the flowers open. Dry them thoroughly, then store in small glass or plastic containers. Crocus laevigatus is hardy to zone 7, has a sweet fragrance, and blooms October into winter.
Color is lavender.
Dormant in late spring and early summer. Clusters of 4 to 12 trumpet shaped fragrant flowers may appear as early as August atop bare reddish brown stalks. Then large straplike leaves form in clumps 2-3 feet across and persist through winter. Grows just about anywhere with no supplemental irrigation as long as it has very good drainage. Should be planted just after bloom period.