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When to plant tomato in Manchester

How to grow TomatoManchester climate
Where are you growing?

Tight fit

Not realistic in greenhouse

Comfortable in a cold frame

Tomato in Manchester is doable with planning outdoors. 78 suitable days are enough for fast varieties (55 days) but not slow ones (90 days).

Start indoors
April 5 – May 27
Transplant outside
June 4 – July 26
Harvest
July 29 – August 20
Season vs crop
78 grow days vs 55–90 needed
Typical frost (last spring – first fall)
April 14 – December 1

Tomato in Manchester is doable with planning outdoors. 78 suitable days are enough for fast varieties (55 days) but not slow ones (90 days).

Start seeds indoors April 5 – May 27, then transplant June 4 – July 26 so the crop can finish outdoors.

Planting conditions

Tomato planting activities across the year: Start indoors, Harden off, Transplant outside, Grow outdoors, HarvestJFMAMJJASOND~Apr 14~Dec 1
  • Start indoors
  • Harden off
  • Transplant outside
  • Grow outdoors
  • 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 row78
Days to harvest55–90 days from transplant
Apr 5 – May 27
Start indoors
May 28 – Jun 3
Harden off
June 4
Transplant outside
Jun 5 – Jul 28
Grow outdoors
Jul 29 – Aug 20
Harvest
ActivityWindowNotes
Start indoorsApr 5 – May 27Sow indoors before the outdoor window.
Harden offMay 28 – Jun 3Acclimate seedlings outdoors before planting.
Transplant outsideJune 4Move plants outside on this day (start of the plant-out window).
Grow outdoorsJun 5 – Jul 28Plants grow outdoors until harvest.
HarvestJul 29 – Aug 20Expected 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 (21 – 29 °C) and tolerable (13 – 35 °C) ranges.

Tomato planting and growing weeks in ManchesterJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECPlantingGrowing
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 frostApril 14
Safer last spring frostApril 14
Typical first fall frostDecember 1
Safer first fall frostDecember 1
Frost-free days230
Earliest indoor seed startApril 5
Latest indoor seed startMay 27
Transplant outdoorsJune 4 – July 26
Direct sow windownot recommended here
Suitable growing windowJune 4 – August 20 (78 days)
Expected harvestJuly 29 – August 20

How these dates are judged

Ideal conditions
Daytime air from 21 – 29 °C.
Suitable conditions
Daytime air from 13 – 35 °C.
Last frost and first frost
Typical spring and fall frost dates for Manchester, shown in the key dates.
Days to harvest
55–90 days from transplant, 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 Tomato: Jun 4 – Aug 20 (78 days)

Planting window for Tomato: Jun 4 – Jul 26 (53 days)

Usually too cold: Jan 1 – May 31; Aug 24 – Dec 31

Outdoors: weekly temperatures and windows

Temperatures across the year for Manchester. 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 13–35 °CTolerable 55–95 °FIdeal 21–29 °CIdeal 70–84 °FWindowGrowingJun 4 – Aug 20PlantingJun 4 – Jul 26Last frost ~Apr 14First frost ~Dec 1
  • 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 23 · Jun 1 – Jun 7

Average 9 to 17 °C · Possible 5 to 23 °C

Growing: too cold (inside window)

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 13 to 35 °C; it is suitable when that average range also overlaps the ideal 21 to 29 °C band and possible readings stay within 0 °C to 35 °C. Crossing a possible limit, or missing the ideal band, makes it tolerable; any chance of frost (possible low below 0 °C) makes it too cold. 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 Manchester

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 53.50, -2.20, 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 Tomato 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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