Divisi
When to plant Yam in Koung-Khi
West, Cameroon
Known here as igname
Yam is a climbing vine that grows one big food tuber underground over a long 7-11 month season.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 14 Feb 2027 – 15 Apr 2027 opens in 19 weeks | 21 Jan 2026 – 1 Jan 2027 |
| Expected harvest | about 15.8 t/ha | same |
| Harvest | From 13 Aug 2027 to 10 Mar 2028, depending on the planting date | |
| Ready to harvest | 180–330 days after planting | |
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 24 Feb 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Koung-Khi 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 15 Apr 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Koung-Khi
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 45% |
For yam in Koung-Khi, the lie of the land is the tightest of the three at 45%. 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 Koung-Khi
| When the rains are expected | February 2026 to December 2026 |
|---|---|
| Rain in a typical year | About 1,863 mm |
| This season's rain | Leaning dry — 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 | 3 kinds of ground. The season below is the largest that farms — about 58% of this area. |
| 58% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 305 growing days · about 1,860 mm · February to December |
|---|---|
| 32% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 309 growing days · about 1,860 mm · February to December |
| 10% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 309 growing days · about 1,890 mm · February to December |
last updated 17 September 2026
Sloping ground holds back about 35% of yield here.
What yam needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.5 and 7.0 |
| Spacing | 100 cm between rows, 100 cm between plants |
| Feed it most with | nitrogen and potassium |
What it takes to grow yam in Koung-Khi
| Planting material | About 10,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 59 kg per hectare |
| Phosphate (P₂O₅) | About 17 kg per hectare |
| Potash (K₂O) | About 91 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. |
These are the nutrients a yam 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 Yam with a plan, not a guess
Everything above describes Koung-Khi 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.
Where to sell Yam nearby
Yam 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 yam grow well in Koung-Khi?
Koung-Khi rates as favourable for yam.
When should I plant yam in Koung-Khi?
Typically 14 Feb 2027 to 15 Apr 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Koung-Khi, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
