Divisi
When to plant Irish potato in Cental Imenti
Meru, Kenya
Known here as viazi mviringo · kiazi
The Irish potato (mbatatisi, ikirayi, viazi mviringo) is a cool-weather crop grown for the tubers that swell underground — it is not a grain, and it is not the same plant as sweet potato.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 24 Sep 2026 – 20 Oct 2026 open now | 21 Jan 2026 – 1 Jan 2027 |
| Expected harvest | about 30.7 t/ha | about 39.5 t/ha |
| Harvest | From 3 Dec 2026 to 27 Feb 2027, depending on the planting date | |
| Ready to harvest | 70–130 days after planting | |
| Work it takes | 110–185 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 7 Oct 2026. That is the point in the window where the rains are most reliably established.
This season's outlook for Cental Imenti 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 20 Oct 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Cental Imenti
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 76% |
For irish potato in Cental Imenti, the soil is the tightest of the three at 76%. This is the one you can actually move. Lime raises a sour soil, manure and compost lift what it holds, and both work within a season or two — money spent here changes the answer.
The 2026 season in Cental Imenti
| Rainy seasons | Two each year — two chances to plant |
|---|---|
| When the rains are expected | February 2026 to June 2026 |
| Rain in a typical year | About 1,126 mm |
| This season's rain | Leaning wet — January, February, October, November and 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 +0.9 °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 one full main crop, 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 18% of this area. |
| 18% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 239 growing days · about 990 mm · February to June |
|---|---|
| 15% | 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 1,400 mm · December to December |
| 11% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 290 growing days · about 1,730 mm · September to July |
| 11% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 263 growing days · about 1,270 mm · September to June |
last updated 30 September 2026
Frost and pest pressure hold back about 15% of yield here.
What irish potato needs to grow here
| Soil it likes | well-drained loam or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Spacing | 75 cm between rows, 28 cm between plants |
| Feed it most with | potassium and magnesium |
What it takes to grow irish potato in Cental Imenti
| Planting material | About 47,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 101 kg per hectare |
| Phosphate (P₂O₅) | About 31 kg per hectare |
| Potash (K₂O) | About 178 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 | 110–185 days per hectare, by hand |
These are the nutrients a irish 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 Irish potato with a plan, not a guess
Everything above describes Cental Imenti 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 Irish potato nearby
Irish 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 irish potato grow well in Cental Imenti?
Cental Imenti rates as favourable for irish potato.
When should I plant irish potato in Cental Imenti?
Typically 24 Sep 2026 to 20 Oct 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Cental Imenti, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
