Divisi
When to plant Sweet potato in Mbama
Cuvette-Ouest, Congo
Sweet potato is a trailing vine you grow from vine cuttings (slips), not from seed and not by planting the root.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 10 Jun 2027 – 30 Jun 2027 opens in 36 weeks | same |
| Expected harvest | about 10.7 t/ha | about 32.2 t/ha |
| Harvest | From 8 Sep 2027 to 27 Nov 2027, depending on the planting date | |
| Ready to harvest | 90–150 days after planting | |
| Work it takes | 70–148 days per hectare, by hand | |
| Rain meets its needs | 49% | |
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 10 Jun 2027. That is the point in the window where the rains are most reliably established.
No seasonal forecast reaches Mbama yet, so these dates follow the rains it usually gets rather than this year's.
Planting after 30 Jun 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Mbama
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 60% |
For sweet potato in Mbama, the lie of the land is the tightest of the three at 60%. 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 Mbama
| When the rains are expected | August 2026 to August 2026 |
|---|---|
| Rain in a typical year | About 1,433 mm |
| This season's rain | Leaning dry. Plant at the early end of the window and favour quicker, more drought-tolerant crops. |
| 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 | 2 kinds of ground. The season below is the largest that farms — about 97% of this area. |
| 97% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 322 growing days · about 1,470 mm · August to July |
|---|---|
| 3% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 320 growing days · about 1,580 mm · August to July |
last updated 16 September 2026
Limited water holds back about 50% of yield here.
What sweet potato needs to grow here
| Soil it likes | well-drained sandy, sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Rain it needs | About 750–1,000 mm across the season |
| Spacing | 100 cm between rows, 30 cm between plants |
| Feed it most with | potassium and nitrogen |
What it takes to grow sweet potato in Mbama
| Planting material | About 33,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 43 kg per hectare |
| Phosphate (P₂O₅) | About 16 kg per hectare |
| Potash (K₂O) | About 86 kg per hectare |
| In the shops | A basal compound at planting — Compound D, or an NPK blend — covers the phosphate and potash. A nitrogen top dressing — urea or AN — goes on once the crop is established. |
| Hand work | 70–148 days per hectare, by hand |
These are the nutrients a sweet potato 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 Sweet potato with a plan, not a guess
Everything above describes Mbama 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.
Sweet potato 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 sweet potato grow well in Mbama?
Mbama rates as favourable for sweet potato.
When should I plant sweet potato in Mbama?
Typically 10 Jun 2027 to 30 Jun 2027, typical season.
Is this exact for my own field?
No — these are readings taken across Mbama, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
