Divisi
When to plant Tomato in Kieni
Nyeri, Kenya
Known here as nyanya
Tomato is the number-one cash vegetable across sub-Saharan Africa — and one of the most demanding.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 27 Sep 2026 – 13 Dec 2026 open now | 22 Mar 2026 – 21 Jan 2027 |
| Expected harvest | about 24.6 t/ha | about 46.0 t/ha |
| Harvest | From 26 Dec 2026 to 12 May 2027, depending on the planting date | |
| Ready to harvest | 90–150 days after planting | |
| Work it takes | 81–160 days per hectare, by hand | |
| Rain meets its needs | 70% | |
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 21 Nov 2026. That is the point in the window where the rains are most reliably established.
This season's outlook for Kieni leans wet. Plant at the early end of the window, and make sure water can drain off the field — a wet year does more damage through waterlogging than through the rain itself.
Planting after 13 Dec 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Kieni
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 88% |
For tomato in Kieni, the lie of the land is the tightest of the three at 88%. 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 Kieni
| When the rains are expected | December 2026 to December 2026 |
|---|---|
| Rain in a typical year | About 832 mm |
| This season's rain | Leaning wet — December look heavier than usual. Make sure water can drain off the field; a wet year does more damage through waterlogging and disease than through the rain itself. |
| This season's heat | Hotter than usual — about +1.0 °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 the largest that farms — about 22% of this area. |
| 22% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 337 growing days · about 1,000 mm · February to January |
|---|---|
| 22% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 365 growing days · about 1,270 mm · January to December |
| 18% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 285 growing days · about 920 mm · September to June |
| 12% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 260 growing days · about 870 mm · September to June |
last updated 30 September 2026
Limited water holds back about 30% of yield here.
What tomato needs to grow here
| Soil it likes | well-drained sandy loam, loam or clay loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 6.8 |
| Spacing | 80 cm between rows, 40 cm between plants |
| Feed it most with | potassium, nitrogen, calcium and boron |
What it takes to grow tomato in Kieni
| Planting material | About 33,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 64 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. |
| Hand work | 81–160 days per hectare, by hand |
These are the nutrients a tomato 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 Tomato with a plan, not a guess
Everything above describes Kieni 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 Tomato nearby
Tomato 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 tomato grow well in Kieni?
Kieni rates as favourable for tomato.
When should I plant tomato in Kieni?
Typically 27 Sep 2026 to 13 Dec 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Kieni, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
