Divisi
When to plant Sweet potato in Fomboni
Mohéli (Mwali), Comores
Sweet potato is a trailing vine you grow from vine cuttings (slips), not from seed and not by planting the root.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Moderate | |
| When to plant | 27 May 2027 – 5 Jun 2027 opens in 34 weeks | 11 Apr 2027 – 30 Jun 2027 |
| Expected harvest | about 6.6 t/ha | about 11.9 t/ha |
| Harvest | From 25 Aug 2027 to 2 Nov 2027, depending on the planting date | |
| Ready to harvest | 90–150 days after planting | |
| Work it takes | 70–148 days per hectare, by hand | |
| Rain meets its needs | 78% | |
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 May 2027. 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 5 Jun 2027 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 | 96% |
| The lie of the land | 30% |
For sweet potato 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 65% of yield here.
What sweet potato needs to grow here
| Soil it likes | well-drained sandy, sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Rain it needs | About 750–1,000 mm across the season |
| Spacing | 100 cm between rows, 30 cm between plants |
| Feed it most with | potassium and nitrogen |
What it takes to grow sweet potato in Fomboni
| Planting material | About 33,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 26 kg per hectare |
| Phosphate (P₂O₅) | About 10 kg per hectare |
| Potash (K₂O) | About 53 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 | 70–148 days per hectare, by hand |
These are the nutrients a sweet 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 Sweet potato 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.
Sweet 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 sweet potato grow well in Fomboni?
Fomboni rates as moderate for sweet potato.
When should I plant sweet potato in Fomboni?
Typically 27 May 2027 to 5 Jun 2027, 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.
