Divisi
When to plant Cotton in Otamanzi
Omusati, Namibia
Cotton is grown for one thing: the soft white fibre — the lint — that grows wrapped around the seeds inside a pod called a boll.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 25 Nov 2026 – 15 Dec 2026 opens in 8 weeks | 20 Jul 2026 – 1 Jan 2027 |
| Expected harvest | about 1.8 t/ha | about 3.7 t/ha |
| Harvest | From 24 Apr 2027 to 13 Jul 2027, depending on the planting date | |
| Ready to harvest | 150–210 days after planting | |
| Work it takes | 91–187 days per hectare, by hand | |
| Rain meets its needs | 72% | |
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 15 Dec 2026. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Otamanzi is close to normal, so these dates match the pattern the area usually follows.
Planting after 15 Dec 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Otamanzi
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 96% |
For cotton in Otamanzi, the soil is the tightest of the three at 76%. This is the one you can actually move. Lime raises a sour soil, manure and compost lift what it holds, and both work within a season or two — money spent here changes the answer.
The 2026/27 season in Otamanzi
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | December 2026 to April 2027 |
| Rain in a typical year | About 508 mm |
| This season's rain | Rain close to usual — plan around about 508 mm falling roughly when it always does |
| This season's heat | Hotter than usual — about +1.6 °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 | One kind of ground throughout. |
last updated 17 September 2026
Limited water holds back about 25% of yield here.
What cotton needs to grow here
| Soil it likes | well-drained sandy loam, loam, clay loam or clay soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 7.5 |
| Spacing | 90 cm between rows, 25 cm between plants |
| Feed it most with | nitrogen, potassium and boron |
What it takes to grow cotton in Otamanzi
| Planting material | About 80,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 50 kg per hectare |
| Phosphate (P₂O₅) | About 25 kg per hectare |
| Potash (K₂O) | About 54 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 | 91–187 days per hectare, by hand |
These are the nutrients a cotton 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 Cotton with a plan, not a guess
Everything above describes Otamanzi 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.
Cotton 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 cotton grow well in Otamanzi?
Otamanzi rates as favourable for cotton.
When should I plant cotton in Otamanzi?
Typically 25 Nov 2026 to 15 Dec 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Otamanzi, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
