Divisi
When to plant Onion in Moshi
Kilimanjaro, United Republic of Tanzania
Known here as kitunguu
Onion is a cool-season vegetable you grow for its bulb — the swollen base of the leaves — but across sub-Saharan Africa it is most often grown as an irrigated hot dry-season crop, and it stands real heat (up to about 42 °C) as long as the water never stops.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 25 Feb 2027 – 19 Mar 2027 opens in 21 weeks | same |
| Expected harvest | about 29.3 t/ha | about 45.0 t/ha |
| Harvest | From 26 May 2027 to 17 Jul 2027, depending on the planting date | |
| Ready to harvest | 90–120 days after planting | |
| Rain meets its needs | 98% | |
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 8 Mar 2027. That is the point in the window where the rains are most reliably established.
This season's outlook for Moshi 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 19 Mar 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Moshi
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 88% |
For onion in Moshi, the lie of the land is the tightest of the three at 88%. 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 Moshi
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | February 2026 to June 2026 |
| Rain in a typical year | About 588 mm |
| This season's rain | Leaning wet — February 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 +1.1 °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 short crop, and only if timed to it, 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 41% of this area. |
| 41% | enough rain for one short crop, and only if timed to it; warm all year, so nothing but rain ends the season 146 growing days · about 530 mm · February to June |
|---|---|
| 12% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 248 growing days · about 910 mm · October to July |
| 10% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 320 growing days · about 1,560 mm · October to August |
| 9% | enough rain for a long crop, or two in a year; warm all year, so nothing but rain ends the season 319 growing days · about 1,520 mm · September to August |
last updated 16 September 2026
Frost and pest pressure hold back about 15% of yield here.
What onion needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 7.0 |
| Spacing | 20 cm between rows, 7 cm between plants |
| Feed it most with | nitrogen, potassium and sulphur |
What it takes to grow onion in Moshi
| Planting material | About 500,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 53 kg per hectare |
| Phosphate (P₂O₅) | About 10 kg per hectare |
| Potash (K₂O) | About 59 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. |
These are the nutrients a onion 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 Onion with a plan, not a guess
Everything above describes Moshi 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 Onion nearby
Onion 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 onion grow well in Moshi?
Moshi rates as favourable for onion.
When should I plant onion in Moshi?
Typically 25 Feb 2027 to 19 Mar 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Moshi, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
