Divisi
When to plant Soybean in Kirinyaga Central
Kirinyaga, Kenya
Known here as soya
Soybean (Glycine max) is a bushy, knee-high bean grown for a seed that is rich in protein and oil — good to eat, good to sell, and it leaves the soil richer for whatever you plant next.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 27 Dec 2026 – 10 Feb 2027 opens in 12 weeks | 20 Jul 2026 – 8 Oct 2026 |
| Expected harvest | about 1.9 t/ha | about 2.7 t/ha |
| Harvest | From 27 Mar 2027 to 10 Jul 2027, depending on the planting date | |
| Ready to harvest | 90–150 days after planting | |
| Work it takes | 68–141 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 27 Dec 2026. That is the point in the window where the rains are most reliably established.
This season's outlook for Kirinyaga Central 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 10 Feb 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Kirinyaga Central
| Rain and temperature | 76% |
|---|---|
| The soil | 96% |
| The lie of the land | 60% |
For soybean in Kirinyaga Central, 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 Kirinyaga Central
| When the rains are expected | December 2026 to December 2026 |
|---|---|
| Rain in a typical year | About 1,723 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 28% of this area. |
| 28% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 354 growing days · about 1,600 mm · February to January |
|---|---|
| 16% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 251 growing days · about 1,120 mm · February to June |
| 16% | 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 1,690 mm · January to December |
| 12% | enough rain for a long crop, or two in a year; cold for much of the year, with a short planting season 365 growing days · about 1,860 mm · January to December |
last updated 30 September 2026
Temperature holds back about 30% of yield here.
What soybean 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 |
| Rain it needs | About 600–1,500 mm across the season |
| Spacing | 50 cm between rows, 6 cm between plants |
| Feed it most with | phosphorus, potassium and sulphur |
What it takes to grow soybean in Kirinyaga Central
| Planting material | About 350,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 104 kg per hectare |
| Phosphate (P₂O₅) | About 28 kg per hectare |
| Potash (K₂O) | About 38 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 | 68–141 days per hectare, by hand |
These are the nutrients a soybean 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 Soybean with a plan, not a guess
Everything above describes Kirinyaga Central 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.
Soybean 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 soybean grow well in Kirinyaga Central?
Kirinyaga Central rates as favourable for soybean.
When should I plant soybean in Kirinyaga Central?
Typically 27 Dec 2026 to 10 Feb 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Kirinyaga Central, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
