How to Grow Bambara Groundnuts
On this page
Bambara groundnuts are ready to harvest 90–180 days after planting.
The short answer
- Ready in
- 90–180 days
- Site
- soil pH 5–6.5
Bambara Groundnut (Vigna subterranea)
Also known as: Bambara Bean · 2 sources cited
Quick Facts
Soil & Growing Conditions
Harvest & Storage
Bambara groundnut through the season
Plan your Bambara Groundnuts planting
Timing for Bambara Groundnuts follows soil temperature and frost, not the calendar date. The Global vegetable planting calendar explains the method. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
What the research guides add
The Colorado State chapter on Bambara groundnut gives the clearest rule for a cooler-climate gardener: treat it like a peanut.
- It is an annual legume of African origin, generally cultivated in sub-Saharan Africa and considered the third most important food legume on the continent after groundnut and cowpea. (Colorado State University)
- It grows best in climates suitable for peanuts: bright sunshine, elevated temperatures, at least 4 months free of frost and frequent rains. (Colorado State University)
- When grown like the peanut, it matures between 3 and 6 months from planting depending on climate and cultivar. (Colorado State University)
Sources for this section
Section researched and checked on 25 October 2026 by the SoilCommander Editorial Team. How we check facts: editorial policy.
Last verified 2026-10-25
Growing Bambara Groundnut in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
Sources
These 2 sources are specific to this region. The full list of 2 sources behind this guide (Plant Resources of Tropical Africa (PROTA), Useful Tropical Plants (tropical.theferns.info)) is in the references of our UK guide to bambara groundnuts; they describe the plant itself, which is the same wherever it grows.
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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How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against international horticultural research and extension sources. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Related guides
More from the same group (peas & beans):
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.