Divisi
When to plant Onion in Turkana South
Turkana, Kenya
Known here as kitunguu
Onion is a cool-season vegetable you grow for its bulb — the swollen base of the leaves — but across sub-Saharan Africa it is most often grown as an irrigated hot dry-season crop, and it stands real heat (up to about 42 °C) as long as the water never stops.
| Fit | Moderate |
|---|---|
| When to plant | 10 Feb 2026 – 17 Nov 2026 open now |
| Expected harvest | about 16.6 t/ha |
| Harvest | From 11 May 2026 to 17 Mar 2027, depending on the planting date |
| Ready to harvest | 90–120 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 2 Mar 2026. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Turkana South is close to normal, so these dates match the pattern the area usually follows.
Planting after 17 Nov 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Turkana South
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 30% |
For onion in Turkana South, the lie of the land is the tightest of the three at 30%. 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 2027 season in Turkana South
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | March 2027 to August 2027 |
| Rain in a typical year | About 531 mm |
| This season's rain | Rain close to usual — plan around about 531 mm falling roughly when it always does |
| What that supports | enough rain for one short crop, and only if timed to it, 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 7% of this area. |
| 92% | too dry for rain-fed cropping without irrigation; warm all year, so nothing but rain ends the season no rain-fed season · about 350 mm |
|---|---|
| 7% | enough rain for one short crop, and only if timed to it; warm all year, so nothing but rain ends the season 145 growing days · about 540 mm · March to August |
last updated 30 September 2026
Sloping ground holds back about 65% of yield here.
What onion needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 7.0 |
| Spacing | 20 cm between rows, 7 cm between plants |
| Feed it most with | nitrogen, potassium and sulphur |
What it takes to grow onion in Turkana South
| Planting material | About 500,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 30 kg per hectare |
| Phosphate (P₂O₅) | About 6 kg per hectare |
| Potash (K₂O) | About 33 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 onion 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 Onion with a plan, not a guess
Everything above describes Turkana South 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.
Onion 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 onion grow well in Turkana South?
Turkana South rates as moderate for onion.
When should I plant onion in Turkana South?
Typically 10 Feb 2026 to 17 Nov 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Turkana South, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
