How to Grow Stock
Matthiola incana
Half Hardy Cool Season Continuous Harvest
When to Start
Sow indoors 6 weeks before last frost, or direct sow outdoors after frost risk has passed and soil reaches 8°C.
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Growth Stages
Sow seeds
Germination ~10d
Flowering ~84d
Sow seeds
Germination ~10d
Flowering ~84d
Approximate days from start
Care Essentials
- Light balanced feed every 2-3 weeks once established. Avoid high-nitrogen feeds which produce foliage at the expense of flowers.
- Fragrant cottage garden favourite from the Brassica family. Prefers cool conditions and well-drained, slightly alkaline soil. Excellent cut flower with a spicy-sweet clove scent. Dislikes heat and humidity.
Companion Planting
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Growing Conditions
Min. soil temperature: 8°C+
Germination temperature: 15–20°C
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- Sow indoors
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- Transplant out
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- First harvest
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Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 35 cm |
| Sow depth | 0.3 cm |
| Mature height | 60 cm |
| Mature spread | 25 cm |
Space 25-30 cm apart for good air circulation. Closer spacing (20 cm) encourages taller stems for cutting.
Care Guide
- Feeding
- Light balanced feed every 2-3 weeks once established. Avoid high-nitrogen feeds which produce foliage at the expense of flowers.
- Watch for
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- Cabbage white butterfly caterpillars
- Flea beetles
- Club root
- Aphids
- Grey mould in humid conditions
Growing Conditions
| Min. soil temperature | 8°C |
| Germination temperature | 15–20°C |
| Base growth temperature | 5°C |
| Min. daylength to start | 10h |
| Photoperiod sensitivity | long day |
Frequently Asked Questions
- How far apart should I plant Stock?
- Plant Stock 30cm apart with 35cm between rows.
- When does Stock flower?
- Stock typically flowers approximately 70 days after transplanting.
- Is Stock frost hardy?
- Stock is classified as Half Hardy.
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