Divisi
When to plant Fonio in Juja
Kiambu, Kenya
Fonio (Digitaria exilis) — also called acha, hungry rice, findi or fundi — is West Africa's ancient small grain and the fastest cereal in the world: early types give grain in about 70 to 85 days, some in as little as 6 to 8 weeks.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 11 Jan 2027 – 6 Feb 2027 opens in 15 weeks | 10 Jun 2026 – 2 Mar 2027 |
| Expected harvest | about 1.0 t/ha | same |
| Harvest | From 12 Mar 2027 to 6 Jun 2027, depending on the planting date | |
| Ready to harvest | 60–120 days after planting | |
| Work it takes | 82–175 days per hectare, by hand | |
| Rain meets its needs | 87% | |
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 Jan 2027. That is the point in the window where the rains are most reliably established.
This season's outlook for Juja 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 6 Feb 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Juja
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 60% |
For fonio in Juja, 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 Juja
| 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 846 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 +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 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 50% of this area. |
| 50% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 208 growing days · about 800 mm · February to June |
|---|---|
| 41% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 190 growing days · about 690 mm · February to June |
| 6% | enough rain for one short crop, and only if timed to it; warm all year, so nothing but rain ends the season 177 growing days · about 650 mm · February to May |
| 3% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 240 growing days · about 950 mm · February to July |
last updated 30 September 2026
What fonio needs to grow here
| Soil it likes | well-drained sand or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Feed it most with | nitrogen and phosphorus |
What it takes to grow fonio in Juja
| Nitrogen (N) | About 20 kg per hectare |
|---|---|
| Phosphate (P₂O₅) | About 6 kg per hectare |
| Potash (K₂O) | About 20 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 | 82–175 days per hectare, by hand |
These are the nutrients a fonio 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 Fonio with a plan, not a guess
Everything above describes Juja 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.
Fonio 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 fonio grow well in Juja?
Juja rates as favourable for fonio.
When should I plant fonio in Juja?
Typically 11 Jan 2027 to 6 Feb 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Juja, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
