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How to Grow Bambara Groundnuts | Full-Season Growing Guide

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Bambara Groundnut (Vigna subterranea)

Bambara groundnut seeds in cream, red, brown and purple. Photo: Ton Rulkens from Mozambique, CC BY-SA 2.0, via Wikimedia Commons.

Also known as: Bambara Bean · 2 sources cited

The short answer

Ready in
90–180 days
Site
soil pH 5–6.5

In the UK, bambara groundnuts are ready to harvest 90–180 days after planting.

Bambara groundnuts (Vigna subterranea) — Frost-tender annual, ripening its pods underground.

Quick Facts

Globose bambara groundnut pods photographed against white with a scale — “Vigna subterranea MHNT.BOT.2009.13.10” by Roger Culos is licensed under CC BY-SA 3.0. Source: Wikimedia Commons
“Vigna subterranea MHNT.BOT.2009.13.10” by Roger Culos is licensed under CC BY-SA 3.0. Source: Wikimedia Commons.
Factor Value
Soil pH 5 - 6.5
Germination temp 30C
Optimal growing temp 20-28C
Time to harvest 90-180 days
Soil texture Light sandy loams preferred; calcareous soils are unsuitable
Drainage Well-drained
Lifecycle Frost-tender annual, ripening its pods underground.

Soil & Growing Conditions

A bambara groundnut plant spreading low over red soil — “Jugo beans plant at the field at Thune Lands” by Lucrucia98 is licensed under CC BY-SA 4.0. Source: Wikimedia Commons
“Jugo beans plant at the field at Thune Lands” by Lucrucia98 is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

Water: Low to moderate; cultivated on 600-750 mm, best yields at 900-1200 mm

Soil pH range

5 6.5

Span reflects genuine variation between the cited authorities, not a single agreed figure.

Harvest & Storage

Bambara groundnut pods split open to show the seed inside — “Vign subteran 130426-35159 tdp” by Wibowo Djatmiko (Wie146) is licensed under CC BY-SA 4.0. Source: Wikimedia Commons
“Vign subteran 130426-35159 tdp” by Wibowo Djatmiko (Wie146) is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

When to pick: Pods ripen underground like a peanut and the whole plant is lifted. PROTA gives maturity 90-180 days after sowing depending on genotype.

References

2 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.

Frequently Asked Questions

How long do bambara groundnuts take to grow?

Typically 90–180 days, depending on cultivar and growing conditions.

What soil pH do bambara groundnuts need?

A pH of about 5–6.5. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.

Plan next season before the problems start

This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.

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SoilCommander Editorial Team

Science-based growing guides · Thresholds that hold in any climate

This guide states the conditions the plant itself responds to — soil temperature, frost tolerance, day length — rather than dates, because the same calendar month means opposite seasons in the northern and southern hemispheres. Anything genuinely restricted to one part of the world is named as such rather than presented as universal. Written and maintained by our editorial team against international horticultural research and extension sources.

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