When to plant fava bean in London

In London, typical last spring frost is April 5 and typical first fall frost is November 14. Typical last spring frost: April 5. Fava bean in London is a good fit outdoors. The suitable growing window of 261 days covers the 80–110 days this plant usually needs.

Fava bean

How to grow Fava bean London climate Weekly temperatures and windows

Where are you growing?

Comfortable

Comfortable in greenhouse

Tight fit in a cold frame

Fava bean in London is a good fit outdoors. The suitable growing window of 261 days covers the 80–110 days this plant usually needs.

When to plantMarch 10 – August 16

Harvest: May 29 – December 9
Season vs crop: 261 grow days vs 80–110 needed
Typical frost (last spring – first fall): April 5 – November 14

Fava bean in London is a good fit outdoors. The suitable growing window of 261 days covers the 80–110 days this plant usually needs.

Planting conditions

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 row261

Days to harvest80–110 days from seed

Mar 10 – Aug 16

Direct sow

May 29 – Dec 9

Harvest

Activity	Window	Notes
Direct sow	Mar 10 – Aug 16	Plant outdoors in this window.
Harvest	May 29 – Dec 9	Expected harvest from typical days to harvest.

Direct sow
Harvest

Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost (35 seasons (1991–2025)). 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 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F)) and tolerable (4 – 24 °C39 – 75 °F4 – 24 °C (39 – 75 °F)) ranges.

Ideal / plantable
Tolerable
Too cold
Too hot
Outside window

Planting uses sow / plant-out rules; growing shows daytime air against this plant’s ideal and tolerable ranges.

Key dates

Typical last spring frostApril 5

Low-risk last spring frostApril 21

Typical first fall frostNovember 14

Low-risk first fall frostOctober 24

Frost-free days222

Outdoor sow dateMarch 10

Direct sow windowMarch 10 – August 16

Suitable growing windowMarch 10 – November 25 (261 days)

Expected harvestMay 29 – December 9

How these dates are judged

Ideal conditions: Daytime air from 15 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F).
Suitable conditions: Daytime air from 4 – 24 °C39 – 75 °F4 – 24 °C (39 – 75 °F).
Last frost and first frost: Typical spring and fall frost dates for London, shown in the key dates.
Days to harvest: 80–110 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. Air ratings on the weekly chart colour only weeks inside that same window — see weekly temperatures and windows.

Other plants for London

Calculated by Plan & Plant. Method. Data 35 seasons (1991–2025).

Frost and suitability dates are typical figures from climate statistics.

Based on 35 years (1991–2025) of ERA5-Land data from Open-Meteo, for an area of about 10 km. Typical dates, not a guarantee.

Dates for London use ERA5-Land cell 51.50, -0.10. How we calculated this · Algorithm 2026-10-season-12.

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