How to Grow Crosne
Stachys affinis
Crosne produces small spiral-shaped tubers with a crisp texture and mild artichoke flavour. Plant tubers in spring in fertile, moisture-retentive soil in a warm sheltered spot. The leafy stems grow through summer; tubers only form as days shorten in autumn. Harvest from November onwards once frost has killed the foliage. Leave tubers in the ground and dig as needed through winter. Save a few to replant the following spring.
When to Start
Direct sow outdoors as soon as soil reaches 8°C — typically early to mid spring. Hardy enough to tolerate light frosts.
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Growth Stages
Approximate days from start
Care Essentials
- Apply a balanced general fertiliser at planting time. A light potash-rich feed in midsummer encourages tuber development. Avoid excessive nitrogen which promotes leaf growth at the expense of tubers.
- Crosne is a rarely grown delicacy prized for its crisp, slightly sweet tubers with a mild artichoke flavour. Being a short-day plant, tubers only form as days shorten in autumn. The plants are low maintenance once established, though they can spread if tubers are left in the ground.
Growing Conditions
- Min. soil temperature
- 8°C+
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- Direct sow
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Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 45 cm |
| Sow depth | 8 cm |
| Mature height | 40 cm |
| Mature spread | 30 cm |
Plant tubers 30 cm apart in rows 45 cm apart, 8-10 cm deep.
Growing Conditions
| Min. soil temperature | 8°C |
| Base growth temperature | 5°C |
| Photoperiod sensitivity | short day |
Frequently Asked Questions
- How far apart should I plant Crosne?
- Plant Crosne 30cm apart with 45cm between rows.
- Is Crosne frost hardy?
- Crosne is classified as Hardy.
