Divisi
When to plant Bambara groundnut in Cameroon
Known here as pois bambara · voandzou
Bambara groundnut (Vigna subterranea) is one of Africa's own beans — a tough, low, bushy plant, often grown by the women of the household on the poorest, sandiest land where maize would fail.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 1 Feb 2027 – 13 Sep 2027 opens in 18 weeks | 21 Jan 2026 – 1 Jan 2027 |
| Expected harvest | about 1.9 t/ha | same |
| Harvest | From 2 May 2027 to 1 Mar 2028, depending on the planting date | |
| Ready to harvest | 90–170 days after planting | |
| Work it takes | 77–157 days per hectare, by hand | |
Rain-fed. These dates are worked out from each place's own rainfall, for a field watered by the season — with irrigation a window can open earlier, close later, or come round more than once a year. Check your own field under What grows, or get the Divisi app for a calendar dated to your farm.
If you only get one chance to plant, aim for around 15 Feb 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Cameroon leans dry, so these dates sit later than the long-run average. Planting on the date you are used to risks germinating into a false start and having to replant.
Planting after 13 Sep 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Cameroon
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 76% |
For bambara groundnut in Cameroon, the lie of the land is the tightest of the three at 76%. You cannot flatten it, but you can farm it: plant along the contour rather than up and down, ridge or tie ridges to hold water on the slope, and expect shallower rooting than the crop would manage on flat ground.
The 2026 season in Cameroon
| When the rains are expected | February 2026 to December 2026 |
|---|---|
| Rain in a typical year | About 1,898 mm in a typical farming district |
| Across its districts | From about 383 mm in the driest of 58 districts to about 3,028 mm in the wettest |
| This season's rain | Leaning dry — February, September, October, November and December look short of rain. Plant at the early end of the window, favour quicker and more drought-tolerant crops, and keep moisture in the soil: mulch, and weed early. |
| This season's heat | Hotter than usual — about +0.8 °C over the growing months. Heat makes the same rain do less, so a dry spell bites sooner: do not plant late, and shade or mulch what you can. |
| What that supports | enough rain for a long crop, or two in a year, warm all year, so nothing but rain ends the season |
| Ground this covers | 4 kinds of ground. The season below is one typical farming district's, not a figure for the whole of this area. |
| 49% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 319 growing days · about 1,520 mm · February to December |
|---|---|
| 35% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 245 growing days · about 1,350 mm · March to November |
| 9% | enough rain for one short crop, and only if timed to it; warm all year, so nothing but rain ends the season 151 growing days · about 690 mm · May to October |
| 5% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 295 growing days · about 1,520 mm · March to December |
last updated 17 September 2026 · from all 58 areas within it
Frost and pest pressure hold back about 15% of yield here.
What bambara groundnut needs to grow here
| Soil it likes | well-drained sand or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Spacing | 40 cm between rows, 15 cm between plants |
| Feed it most with | phosphorus and calcium |
What it takes to grow bambara groundnut in Cameroon
| Planting material | About 125,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 95 kg per hectare — the crop fixes most of this itself; inoculated seed matters more than a bag |
| Phosphate (P₂O₅) | About 19 kg per hectare |
| Potash (K₂O) | About 48 kg per hectare |
| In the shops | A basal compound at planting — Compound D, or an NPK blend — covers the phosphate and potash. Skip the nitrogen top dressing; inoculated seed does that job. |
| Hand work | 77–157 days per hectare, by hand |
These are the nutrients a bambara groundnut crop of that size carries off the field. What you actually apply depends on what your soil already holds — which is what a soil test, or the app's field records, tell you.
What to watch for
Grow Bambara groundnut with a plan, not a guess
Everything above describes Cameroon as a whole — your own soil, slope and rainfall will shift the dates. The Divisi app works them out for your field, and dates each job that follows.
Bambara groundnut in nearby districts
This calendar moves
Planting windows shift with the forecast. Leave your email and we'll send what changed, and a note when planting time nears — a couple of emails a month at most.
Frequently asked questions
Will bambara groundnut grow well in Cameroon?
Cameroon rates as favourable for bambara groundnut.
When should I plant bambara groundnut in Cameroon?
Typically 1 Feb 2027 to 13 Sep 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Cameroon, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
