Saffron Crocus Bulbs | Crocus sativus, Fall-Blooming

Grow Saffron Threads from Purple Autumn Flowers

Saffron crocus (Crocus sativus) produces purple autumn flowers with three red stigmas per bloom. These red threads are the part harvested and dried for saffron, bringing a small-scale spice-growing project to a sunny garden or well-drained container.

Check the planting as autumn flowers open, gather the red threads carefully, and enjoy the satisfaction of growing a little saffron for your own kitchen. Harvests are small: many flowers are needed for a useful quantity of dried spice.

What You Are Ordering

• Product: Saffron crocus corms for planting, commonly sold as bulbs; not seeds or packaged saffron spice.
• Botanical name: Crocus sativus.
• Pack options: Choose 10, 25, or 100 corms. The size selector labels these packs as bulbs.
• Flower color: Purple with red stigmas.
• Bloom season: Fall, often September–October depending on climate and planting conditions.
• Listed hardiness: USDA zones 6–8.

Planting and Growing

Plant in late summer to early fall, promptly after arrival when seasonal conditions are suitable. Choose full sun to light shade and freely draining soil. In wet locations, consider a raised bed or container with drainage holes rather than a spot where water collects.

• Follow the planting depth and spacing provided with your corms.
• Water after planting to settle the soil, avoiding waterlogged conditions.
• Monitor moisture during active growth and allow good drainage throughout the year.
• Leave green foliage intact until it yellows and dies back naturally so it can replenish the corms.
• Mark the planting location so dormant corms are not accidentally disturbed. Foliage may persist beyond the flowering season.

Flowering and Harvest Expectations

Not every corm will flower in its first season. Blooming depends on corm size, planting timing, and growing conditions; there is no fixed minimum pack size that guarantees a harvest. Established plantings may multiply, but increasing yields each year are not guaranteed.

Harvesting Saffron

Harvest only from confidently identified Crocus sativus plants grown for culinary use. With clean hands or tweezers, collect the three red stigmas from newly opened flowers. Dry them thoroughly in a clean, protected location, then store fully dried threads in an airtight container away from light and moisture.

Use the dried threads sparingly in cooking, steeping them in a little warm liquid before adding to dishes such as rice or risotto.

Important Identification and Safety

Only the red stigmas are harvested as saffron. Do not eat the corms or other plant parts. Saffron crocus must not be confused with Colchicum, also called autumn crocus, which is poisonous, or with ornamental spring crocuses. Never harvest from unidentified plants. Keep planting stock away from children and pets, and follow any supplier treatment-label restrictions before using flowers for food.