How to Grow Saffron Crocus
Crocus sativus
Saffron crocus is an autumn-flowering bulb that produces the world's most expensive spice from its three red stigmas per flower. Plant corms 10-15cm deep in July or August in a hot, south-facing position with excellent drainage. The corms need a baking-hot dry summer to flower well in autumn, so a raised bed or gravel garden works best in the UK. Protect corms from mice and squirrels with wire mesh baskets. Leave foliage to die back naturally in spring as it feeds the corm for next year's flowers.
Yearly Lifecycle
Care Essentials
Light feed with bone meal when planting in summer. Top-dress with compost in spring.
Watch For
- Mice and squirrels (eat corms)
- Corm rot in wet soil
Companions
Thyme, Lavender
Track your Saffron Crocus care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun essential, hot south-facing position
Full sun is essential for flowering. A hot, south-facing position helps ripen corms over summer for autumn blooms. Avoid shaded or north-facing sites.
💧 Watering
Dry in summer, light water when growth resumes
Keep dry during summer dormancy. Water lightly when growth resumes in autumn if conditions are very dry. Good drainage is critical year-round.
🌱 Fertilizing
Bone meal at planting, compost in spring
Light feed with bone meal when planting in summer. Top-dress with compost in spring while foliage is active.
🍎 Harvesting
Pick red stigmas on opening, dry immediately
Pick the three red stigmas from each flower as soon as it opens in October. Dry on paper in a warm place. Each flower produces just three stigmas.
Growing Tips
Protect from rodents
Plant corms in wire mesh baskets to protect from mice and squirrels, which will dig up and eat them.
Harvest stigmas promptly
Pick the three red stigmas from each flower as soon as it opens in October and dry them on paper in a warm place.
Don't cut foliage
Leave foliage to die back naturally in spring — it feeds the corm for next year's flowers. Remove only when fully brown.
Hot and dry in summer
A hot, dry summer position is essential for flowering; raised beds or gravel gardens give the best drainage in the UK.
Pests & Diseases
Pest Mice and Voles
Identification: Corms disappear or are found partially eaten; small tunnels near planting sites
- Plant corms in fine-mesh wire baskets buried in the soil
- Place holly leaves or grit around corms as a deterrent
- Encourage owls and cats as natural predators
- Not recommended near edible crops
Pest Squirrels
Identification: Disturbed soil and missing corms shortly after planting; partially eaten corms on the surface
- Cover planting areas with chicken wire pegged flat until shoots emerge
- Plant corms in wire baskets
- Not applicable
Disease Corm Rot Fusarium oxysporum
Symptoms: Soft, mushy corms with brown or black discolouration; poor or no emergence; foul smell when dug up
Treatment: Dig up and destroy affected corms. Do not replant in the same spot for several years.
Prevention: Plant in very well-drained soil. Add grit to heavy ground. Avoid waterlogged sites. Inspect corms before planting.
Disease Grey Mould (Botrytis) Botrytis cinerea
Symptoms: Fuzzy grey mould on flowers and foliage in damp conditions; flowers fail to open properly
Treatment: Remove affected flowers and foliage promptly. Improve air circulation.
Prevention: Avoid overcrowding. Ensure good drainage. Remove debris around plants.
Spacing & Planting
| Plant spacing | 10 cm |
| Row spacing | 15 cm |
| Mature height | 15 cm |
| Mature spread | 10 cm |
Dense planting for saffron harvest. Plant corms in late summer for fall bloom.
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