How to Grow Sea Beet
Beta vulgaris subsp. maritima
Sea beet is the wild ancestor of spinach beet and chard, producing masses of dark, glossy, nutritious leaves from late spring through winter. Sow direct in spring or start under cover for an earlier harvest. Thin to 30 cm and water well during dry spells. Pick leaves regularly from the outside to prevent bolting and keep the plant productive. Extremely salt and wind tolerant — ideal for exposed and coastal plots. Plants often overwinter and reshoot in spring.
When to Start
Direct sow outdoors as soon as soil reaches 5°C — typically early to mid spring. Can also be started indoors 4 weeks earlier for a head start.
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Growth Stages
Approximate days from start
Care Essentials
- Light feeder. Incorporate compost or a general fertiliser before sowing. Top-dress with a nitrogen-rich feed in midsummer to support continued leaf production through the season.
- Sea beet is the wild ancestor of beetroot, chard, and sugar beet. It is highly nutritious, very cold-hardy, and often productive well into winter. Excellent salt and wind tolerance makes it ideal for coastal gardens.
Growing Conditions
- Min. soil temperature
- 5°C+
- Germination temperature
- 7–20°C
Pet Safety
- Sow indoors
- —
- Transplant out
- —
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Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 45 cm |
| Mature height | 60 cm |
| Mature spread | 50 cm |
Growing Conditions
| Min. soil temperature | 5°C |
| Germination temperature | 7–20°C |
Frequently Asked Questions
- How far apart should I plant Sea Beet?
- Plant Sea Beet 30cm apart with 45cm between rows.
- Is Sea Beet frost hardy?
- Sea Beet is classified as Hardy.
