How to Grow Broccolini
Brassica oleracea var. italica x alboglabra
Broccolini is a broccoli-gai lan hybrid that produces slender tender stems topped with small florets. Sow indoors in modules, transplant after 4-5 weeks into fertile, firm soil in full sun. Space 30cm apart. Net against cabbage whites. Keep well watered for continuous stem production. Harvest stems at 15-20cm by cutting low — side shoots will keep producing for weeks. More heat-tolerant than broccoli, ideal for succession sowing spring through summer.
When to Start
Direct sow outdoors as soon as soil reaches 6°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
- Nitrogen-rich feed at planting. Liquid feed fortnightly once stems begin elongating.
- A hybrid between broccoli and Chinese broccoli (gai lan), producing long tender stems with small florets. More heat-tolerant than regular broccoli with a sweeter, milder flavour.
Growing Conditions
- Min. soil temperature
- 6°C+
- Germination temperature
- 15–25°C
- Sow indoors
- —
- Transplant out
- —
- First harvest
- —
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Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 45 cm |
| Sow depth | 1 cm |
| Mature height | 70 cm |
| Mature spread | 30 cm |
Closer spacing than broccoli due to slender habit. Thin stems need less room.
Growing Conditions
| Min. soil temperature | 6°C |
| Germination temperature | 15–25°C |
| Base growth temperature | 5°C |
| Min. daylength to start | 9h |
| Photoperiod sensitivity | long day |
Frequently Asked Questions
- How far apart should I plant Broccolini?
- Plant Broccolini 30cm apart with 45cm between rows.
- When can I harvest Broccolini?
- Broccolini is ready to harvest approximately 60 days after transplanting.
- Is Broccolini frost hardy?
- Broccolini is classified as Hardy.
