When to sow Chinese broccoli (kai lan) in the UK
Chinese broccoli (kai lan) is sown to the calendar rather than to the frost, so the window is much the same wherever you garden in the UK.
Sowing and harvest dates by region
Chinese broccoli (kai lan) is grown to the calendar rather than to the frost, so the same dates apply across the whole UK and every region below reads the same. Where a plant’s timings do follow the frost, Plot shifts them from the Midlands and Lowland Wales baseline using Met Office average frost dates.
| Where you are | Sow indoors | Sow outdoors | Plant out | Harvest |
|---|---|---|---|---|
| South West Coast and Cornwall | early April to late August | early April to late September | early May to late September | early July to late November |
| South Coast and Channel | early April to late August | early April to late September | early May to late September | early July to late November |
| Greater London (Urban Heat Island) | early April to late August | early April to late September | early May to late September | early July to late November |
| South East and Home Counties | early April to late August | early April to late September | early May to late September | early July to late November |
| East Anglia | early April to late August | early April to late September | early May to late September | early July to late November |
| Midlands and Lowland Wales | early April to late August | early April to late September | early May to late September | early July to late November |
| Wales and West Coast | early April to late August | early April to late September | early May to late September | early July to late November |
| Northern England | early April to late August | early April to late September | early May to late September | early July to late November |
| Scotland Lowlands and Central Belt | early April to late August | early April to late September | early May to late September | early July to late November |
| Scotland Highlands and Islands | early April to late August | early April to late September | early May to late September | early July to late November |
| Northern Ireland | early April to late August | early April to late September | early May to late September | early July to late November |
| Channel Islands and Isle of Man | early April to late August | early April to late September | early May to late September | early July to late November |
Growing notes
Sow indoors from mid-spring or outdoors between April and September; stems, leaves, buds and flowers are all edible and florets form after about ten weeks, generally July to November. Mature plants take light frost, and cloches can stretch picking into winter.
At a glance
- Spacing
- 30 cm between plants
- Row spacing
- 30 cm
- Plants per m²
- 11
- Days to maturity
- 70 days
- Yield per plant
- 0.3 kg
- Sun
- Full
- Frost tender
- No
- Grows in a container
- Yes, 20 litres or more
- Minimum soil depth
- 30 cm
- Balcony rating
- 4 out of 5
Succession sowing
Worth sowing in batches. Sow again every 21 days, up to about 5 sowings in a season, for a longer picking window rather than one glut.
What usually goes wrong
- clubroot
- cabbage root fly
- cabbage white caterpillars
- flea beetle
Companion planting
Grows well near
Keep away from
Related guides
Timings cross-checked against RHS guidance for chinese broccoli (kai lan).