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When to plant radish in Newcastle upon Tyne

How to grow RadishNewcastle upon Tyne climate
Where are you growing?

Comfortable

Tight fit in greenhouse

Tight fit in a cold frame

Radish in Newcastle upon Tyne is a good fit outdoors. The suitable growing window of 252 days covers the 22–35 days this plant usually needs.

When to plantApril 2 – November 18

Harvest
April 24 – December 9
Season vs crop
252 grow days vs 22–35 needed
Typical frost (last spring – first fall)
May 14 – November 28

Radish in Newcastle upon Tyne is a good fit outdoors. The suitable growing window of 252 days covers the 22–35 days this plant usually needs.

Days are short and dull from about mid-October to late February, so autumn sowings grow slowly.

Planting conditions

Radish planting activities across the year: Direct sow, HarvestJFMAMJJASOND~May 14~Nov 28
  • Direct sow
  • Harvest
Local activity windows for this place and growing method. Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost.
Suitable growing days in a row252
Days to harvest22–35 days from seed
Apr 2 – Nov 18
Direct sow
Apr 24 – Dec 9
Harvest
ActivityWindowNotes
Direct sowApr 2 – Nov 18Plant outdoors in this window.
HarvestApr 24 – Dec 9Expected harvest from typical days to harvest.
Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost. Adjust a week or two for your conditions.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (15 – 27 °C) and tolerable (4 – 30 °C) ranges.

Radish planting and growing weeks in Newcastle upon TyneJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECPlantingGrowing
Planting uses sow / plant-out rules (frost, soil germination, night, and last-sow): green when plantable, blue diagonal when nights or soil are too cold, amber cross-hatch when too hot, faint for other calendar limits. Growing shows daytime air against this plant’s ideal and tolerable ranges across the year.

Key dates

Typical last spring frostMay 14
Safer last spring frostMay 14
Typical first fall frostNovember 28
Safer first fall frostNovember 28
Frost-free days197
Outdoor sow dateApril 2
Direct sow windowApril 2 – November 18
Suitable growing windowApril 2 – December 9 (252 days)
Expected harvestApril 24 – December 9

How these dates are judged

Ideal conditions
Daytime air from 15 – 27 °C.
Suitable conditions
Daytime air from 4 – 30 °C.
Last frost and first frost
Typical spring and fall frost dates for Newcastle upon Tyne, shown in the key dates.
Days to harvest
22–35 days from seed, from typical days to harvest.
Sowing window
Dated sow and harvest bars use frost dates, soil minima, night limits, and last-sow count-back from typical crop timing. The year strip and weekly chart use the same window: air ratings only colour weeks inside it.

Growing window for Radish: Apr 2 – Dec 9 (252 days)

Planting window for Radish: Apr 2 – Nov 18 (231 days)

Usually too cold: Jan 1 – Feb 15; Feb 23 – Mar 22; Dec 7 – Dec 13; Dec 28 – Dec 31

Outdoors: weekly temperatures and windows

Temperatures across the year for Newcastle upon Tyne. Shaded bands are this plant’s ideal and tolerable daytime air ranges. Growing is daytime air suitability; Planting is sow / plant-out conditions (same colour language). Window brackets mark each stretch.

JanFebMarAprMayJunJulAugSepOctNovDec−10 °C14 °F0 °C32 °F10 °C50 °F20 °C68 °F30 °C86 °FTolerable 4–30 °CTolerable 39–86 °FIdeal 15–27 °CIdeal 59–81 °FWindowGrowingApr 2 – Dec 9PlantingApr 2 – Nov 18Last frost ~May 14First frost ~Nov 28
  • Ideal range
  • Tolerable range
  • Possible min to max
  • Average min to max
  • Suitable
  • Tolerable
  • Too cold
  • Too hot

Selected week · tap a week or use the arrows

Week 14 · Mar 30 – Apr 5

Average 4 to 10 °C · Possible −1 to 16 °C

Growing: too cold (inside window)

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 4 to 30 °C; it is suitable when that average range also overlaps the ideal 15 to 27 °C band and possible readings stay within 4 °C to 30 °C. Crossing a possible limit, or missing the ideal band, makes it tolerable; a possible low below 4 °C makes it tolerable. When a sowing window is calculated, weeks outside that window are uncoloured even if air is in range.

Based on average frost dates.

Show all 53 weeks
Cover method weekly charts

Outdoor weekly chart is above. Open a cover chart only if you grow under fleece, a cold frame, or an unheated greenhouse.

Other plants for Newcastle upon Tyne

Calculated by Plan & Plant · Method · Data 2019–2026

Frost and suitability dates are typical figures from climate statistics. Microclimates vary; they are not a guarantee.

How we calculated this
  • Data: ERA5-Land via Open-Meteo, cell 54.97, -1.61, years 2019–2026 (not a 30-year climate normal yet).
  • Typical and safer dates: Typical last frost is the date after which half of winters in this sample had no more frost; safer is later in the sample so fewer winters still frosted.
  • Crop rule: Local windows for Radish from frost dates, temperature ratings, and crop timing rules.
  • Confidence: Provisional — short or thin sample for this place.
  • Full methodology (algorithm 2026-10-season-6).

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