Divisi
When to plant Cassava in Fomboni
Mohéli (Mwali), Comores
Cassava is a hardy, woody shrub grown for its fat, starchy roots — a food that grows where little else will.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant (establish) | 20 Sep 2026 – 10 Oct 2026 open now | 21 Jan 2026 – 1 Jan 2027 |
| Expected harvest | about 19.2 t/ha | about 20.8 t/ha |
| Bearing cycle | 240–730 days per crop once the plant is established. Planting to the first harvest takes longer than one cycle. | |
| Work it takes | 103–180 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 20 Sep 2026. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Fomboni is close to normal, so these dates match the pattern the area usually follows.
Planting after 10 Oct 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Fomboni
| Rain and temperature | 96% |
|---|---|
| The soil | 88% |
| The lie of the land | 30% |
For cassava in Fomboni, 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 2026 season in Fomboni
| When the rains are expected | August 2026 to August 2026 |
|---|---|
| Rain in a typical year | About 1,959 mm |
| This season's rain | Rain close to usual — plan around about 1,959 mm falling roughly when it always does |
| 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 | 2 kinds of ground. The season below is the largest that farms — about 60% of this area. |
| 60% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 347 growing days · about 1,850 mm · August to August |
|---|---|
| 40% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 336 growing days · about 1,830 mm · September to September |
last updated 17 September 2026
Sloping ground holds back about 40% of yield here.
What cassava needs to grow here
| Soil it likes | well-drained sand or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 4.5 and 6.5 |
| Spacing | 100 cm between rows, 100 cm between plants |
| Feed it most with | potassium and zinc |
What it takes to grow cassava in Fomboni
| Planting material | About 10,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 94 kg per hectare |
| Phosphate (P₂O₅) | About 48 kg per hectare |
| Potash (K₂O) | About 134 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 | 103–180 days per hectare, by hand |
These are the nutrients a cassava 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 Cassava with a plan, not a guess
Everything above describes Fomboni 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.
Cassava 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 cassava grow well in Fomboni?
Fomboni rates as favourable for cassava.
When should I plant cassava in Fomboni?
Typically 20 Sep 2026 to 10 Oct 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Fomboni, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
