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UK plant library · vegetable

Broad bean

Vicia faba · Fabaceae

Earliest bean crop, autumn or spring sown

Broad bean

Photo: Unknown, Public domain, via Wikimedia Commons

Sun
Full sun
Soil
Fertile, well-drained
Soil pH
Slightly acid to neutral, about pH 6.0-7.0 (add lime below pH 5.6); tolerates acid, neutral and alkaline soils
Water
Water at flowering
Hardiness
Hardy (autumn sowings overwinter)
Height and spread
60cm-1.2m

Guv's tipPinch out broad bean tips once pods set, and pinch out any blackfly-infested tips too. Good spacing and drainage keep chocolate spot at bay.

Through the year

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow or plant
Harvest

Timings are for the UK as a whole. Northern and exposed gardens often run a couple of weeks later.

When to plant

Sow Jan/Feb-May and Oct-Nov. Plant out Mar-May

Harvest or flowering

Harvest May-Aug

Pruning

Pinch out tips once pods set

Making more plants

Seed

Watch out for

Pest

Blackfly (black bean aphid)

Look for: Dense black aphid colonies on shoot tips

What to do: Pinch out infested tips, encourage predators, wash off

Pest

Pea and bean weevil

Look for: U-shaped notches in leaf edges

What to do: Usually tolerable on established plants

Pest

Mice and voles

Look for: Sown seeds dug up and eaten

What to do: Start seeds in modules, traps

Disease

Broad bean chocolate spot

Botrytis fabae

Look for: Chocolate-brown spots on leaves and stems

What to do: Good spacing and drainage, avoid excess nitrogen

Always read and follow the label on any treatment, and check it is approved for use where you live.

Safety and spread

Pets and people: Favism: people with G6PD deficiency can develop haemolytic anaemia from eating the beans. Not on the ASPCA list

Weed risk: None known

Checked against two or more reputable gardening sources. How we check our facts
Keep it by the back door

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Printable pest and disease charts with real photographs, and all 50 UK plants in one book.

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