Saffron Crocus

Saffron crocus (Crocus sativus) is an autumn-flowering corm grown for purple to lavender flowers and the red stigmas used as saffron. Each flower produces three stigmas that can be harvested for flavoring and coloring food. [NC State Extension](https://plants.ces.ncsu.edu/plants/crocus-sativus/) and the [RHS saffron guide](https://www.rhs.org.uk/herbs/saffron) describe its fall bloom and culinary use. ## Flowers and harvest The flowers usually open in fall, often around October, and last for a short period. Pick the long red stigmas from open flowers, then dry them gently and store them in an airtight container away from light. Do not confuse saffron crocus with Colchicum, another plant sometimes called autumn crocus. ## Growing conditions Plant corms in a bright, sunny site with rich, well-drained soil. NC State Extension gives a mature height of 6–10 in and width of 2–4 in, and USDA zones 5–8. Saffron crocus is dormant during the warmest part of the year and grows again in cooler weather. ## Maintenance Water corms after planting and avoid waterlogged soil, which can cause rot. Let the leaves die back naturally after flowering so they replenish the corms. Divide crowded clumps when dormant and replant the cormlets.