UK sowing calendar
When to sow radishes in the UK
Radishes sowing calendar (UK)
| Sow under cover | n/a |
|---|---|
| Sow / plant outdoors | Feb-Sep |
| Harvest | Apr-Nov (winter types stored into winter) |
Fast, easy direct-sow crop - salad radishes are ready in as little as 4 weeks. Sow little and often spring to late summer, avoiding hot dry spells that trigger bolting; the earliest Feb sowings need pre-warmed soil under cloches, and winter radishes are sown Jul-Aug.
UK timing runs on the last-frost date, not a USDA zone. Most of Britain sees its last frost around mid-May, with the north and exposed inland gardens a week or two later and the mild south-west and coast earlier. Tender crops start under cover and only go out once frost has passed; hardy crops can be direct-sown as soon as the soil is workable.
Timing aligned with the RHS grow-your-own guide for radishes.
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When to sow radishes in the UK — FAQs
When should I sow radishes in the UK?
Sow radishes outdoors feb-sep. Fast, easy direct-sow crop - salad radishes are ready in as little as 4 weeks. Sow little and often spring to late summer, avoiding hot dry spells that trigger bolting; the earliest Feb sowings need pre-warmed soil under cloches, and winter radishes are sown Jul-Aug.
Can you sow radishes outdoors in the UK?
Yes — sow or plant radishes outdoors feb-sep. Wait until after the last frost (around mid-May, later in the north) for anything tender.
When is radishes ready to harvest in the UK?
Radishes is typically harvested Apr-Nov (winter types stored into winter) in the UK, depending on your sowing date, cultivar and region.
Is it too late to sow radishes?
It depends on the month and your region. Radishes has a UK outdoor window of feb-sep; northern and exposed gardens run a week or two behind the south. Open Growli and tell it your postcode for timing tuned to your own last-frost date.