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When to plant green bean in Newcastle upon Tyne

How to grow Green beanNewcastle upon Tyne climate
Where are you growing?

Not realistic outdoors

Not realistic in greenhouse

Tight fit in a cold frame

Green bean in Newcastle upon Tyne is doable with planning in a cold frame. 50 suitable days are enough for fast varieties (50 days) but not slow ones (65 days).

When to plantJuly 23 – August 25

Harvest
50–65 days from seed
Season vs crop
50 grow days vs 50–65 needed
Typical frost (last spring – first fall)
March 5 – January 7

Green bean in Newcastle upon Tyne is doable with planning in a cold frame. 50 suitable days are enough for fast varieties (50 days) but not slow ones (65 days).

Estimate. Protection varies with the cover, the weather and how you vent it.

A closed cold frame keeps nights up to about 3–6 °C warmer than outside. Open it on sunny days.

Cover dates are modelled from weather-model data using published greenhouse studies. They are not measured in your greenhouse. A max–min thermometer inside will tell you more.

Planting conditions

Green bean planting activities across the year: Direct sowJFMAMJJASOND~Mar 5~Jan 7
  • Direct sow
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 row50
Days to harvest50–65 days from seed
Jul 23 – Aug 25
Direct sow
ActivityWindowNotes
Direct sowJul 23 – Aug 25Plant outdoors in this window.
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.

Protected frost and sowing dates are modelled estimates from weather-model data and published greenhouse studies, not measured in your greenhouse. A max–min thermometer inside will tell you more.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (21 – 35 °C) and tolerable (13 – 38 °C) ranges, from modelled cover temperatures for the growing method you selected.

Green bean 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 frostMarch 5
Safer last spring frostMarch 5
Typical first fall frostJanuary 7
Safer first fall frostJanuary 7
Frost-free days307
Outdoor sow dateJuly 23
Direct sow windowJuly 23 – August 25
Suitable growing windowJuly 23 – September 10 (50 days)

How these dates are judged

Ideal conditions
Daytime air from 21 – 35 °C.
Suitable conditions
Daytime air from 13 – 38 °C.
Last frost and first frost
Typical spring and fall frost dates for Newcastle upon Tyne, shown in the key dates.
Days to harvest
50–65 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 Green bean: Jul 23 – Aug 15 (24 days)

Planting window for Green bean: Jul 23 – Aug 21 (30 days)

Usually too cold: Jan 1 – Jun 21; Jun 29 – Jul 12; Aug 24 – 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 °F40 °C104 °FTolerable 13–38 °CTolerable 55–100 °FIdeal 21–35 °CIdeal 70–95 °FWindowGrowingJul 23 – Aug 15PlantingJul 23 – Aug 21Last 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 30 · Jul 20 – Jul 26

Average 13 to 19 °C · Possible 10 to 24 °C

Growing: tolerable

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 13 to 38 °C; it is suitable when that average range also overlaps the ideal 21 to 35 °C band and possible readings stay within 0 °C to 38 °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 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 Green bean 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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