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When to plant green bean in San Diego

How to grow Green beanSan Diego climate
Where are you growing?

Comfortable

Comfortable in greenhouse

Comfortable in a cold frame

Green bean in San Diego is a good fit outdoors. The suitable growing window of 235 days covers the 50–65 days this plant usually needs.

When to plantMarch 16 – November 28

Harvest
May 5 – November 5
Season vs crop
235 grow days vs 50–65 needed

Green bean in San Diego is a good fit outdoors. The suitable growing window of 235 days covers the 50–65 days this plant usually needs.

Planting conditions

Green bean planting activities across the year: Direct sow, HarvestJFMAMJJASOND
  • Direct sow
  • Harvest
Local activity windows for this place and growing method. Blue fill is usually too cold for this plant.
Suitable growing days in a row235
Days to harvest50–65 days from seed
Mar 16 – Nov 28
Direct sow
May 5 – Nov 5
Harvest
ActivityWindowNotes
Direct sowMar 16 – Nov 28Plant outdoors in this window.
HarvestMay 5 – Nov 5Expected harvest from typical days to harvest.
Blue fill is usually too cold for this plant. 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 (70 – 95 °F) and tolerable (55 – 100 °F) ranges.

Green bean planting and growing weeks in San DiegoJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECPlantingGrowing
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

Frost-free days365
Outdoor sow dateMarch 16
Direct sow windowMarch 16 – November 28
Suitable growing windowMarch 16 – November 5 (235 days)
Expected harvestMay 5 – November 5

How these dates are judged

Ideal conditions
Daytime air from 70 – 95 °F.
Suitable conditions
Daytime air from 55 – 100 °F.
Last frost and first frost
Typical spring and fall frost dates for San Diego, 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: Mar 16 – Nov 5 (235 days)

Planting window for Green bean: Mar 16 – Nov 28 (258 days)

Usually too cold: Jan 1 – Mar 15

Outdoors: weekly temperatures and windows

Temperatures across the year for San Diego. 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 °FWindowGrowingMar 16 – Nov 5PlantingMar 16 – Nov 28No typical frost here. Timing follows heat, not frost.
  • 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 12 · Mar 16 – Mar 22

Average 50 to 63 °F · Possible 44 to 74 °F

Growing: too cold (inside window)

Planting: suitable

A week is in range when its average low and high sit inside the tolerance band 55 to 100 °F; it is suitable when that average range also overlaps the ideal 70 to 95 °F band and possible readings stay within 32 °F to 100 °F. Crossing a possible limit, or missing the ideal band, makes it tolerable; any chance of frost (possible low below 32 °F) 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 San Diego

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 32.72, -117.16, 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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