Last edited on 1 Nov 2026. View history

Scarlet Runner Bean

Phaseolus coccineus

A variety of bean

A runner with vines to 3 m and bright scarlet flowers. Eaten green, shelled or dried. Huge violet-purple seeds mottled with black.

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Scarlet runner bean facts

Lifespan

Annual living and reproducing in a single year or less

Growing scarlet runner beans

  1. Dig the bed and add compost 1 week before sowing
  2. Put up supports for climbing beans 1 week after sowing
  3. Water regularly at sowing every week
  4. Weed carefully 3 weeks after sowing every 2 weeks
  5. Pick beans regularly at first harvest every week
  6. Leave some pods to dry for seed 6 weeks after first harvest
  7. Pull out finished plants and dig in the roots 8 weeks after first harvest

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Ecological requirements

Data from the FAO EcoCrop database for Phaseolus coccineus L.

Family / Taxonomy Magnoliopsida
Rosidae
Fabales
Leguminosae
Optimal temperature 12 - 26 °C
Absolute temperature 5 - 30 °C
Optimal rainfall 800 - 1500 mm/year
Absolute rainfall 400 - 2600 mm/year
Optimal soil pH 5.5 - 7.0
Absolute soil pH 5.0 - 8.2
Crop cycle 80 - 365 days
Max altitude 2800 m
Life form herb
Life span annual, perennial
Habit climber/scrambler/scadent
Optimal soil depth medium (50-150 cm)
Optimal soil texture medium
Optimal soil fertility high
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod short day (<12 hours), neutral day (12-14 hours)
Optimal light very bright

Licensed under CC-BY-4.0 .

Food and Agriculture Organization of the United Nations (2025) ECOCROP, the crop ecological requirements database. Version 1. https://data.apps.fao.org/catalog/dataset/ecocrop. Accessed through the CGIAR Climate Action Data Hub, https://cgiar-climate-data-hub.github.io/catalog/ecocrop_1/.

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