Divisi
When to plant Maize in West Coast
Western Cape, South Africa
Known here as ummbila · umbona · mielie
C4 annual grass, wind- and cross-pollinated — buy hybrid seed fresh each season and isolate seed crops / sweetcorn from field maize by ~200 m.
| Fit | Favourable |
|---|---|
| When to plant | 9 Aug 2026 – 10 Feb 2027 open now |
| Expected harvest | about 6.3 t/ha |
| Harvest | From 7 Dec 2026 to 30 Jun 2027, depending on the planting date |
| Ready to harvest | 120–140 days after planting |
| Work it takes | 82–165 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 21 Jan 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for West Coast is close to normal, so these dates match the pattern the area usually follows.
Planting after 10 Feb 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in West Coast
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 45% |
For maize in West Coast, the lie of the land is the tightest of the three at 45%. 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 2027 season in West Coast
| Rain in a typical year | About 187 mm |
|---|---|
| This season's rain | Rain close to usual — plan around about 187 mm falling roughly when it always does |
| What that supports | too dry for rain-fed cropping without irrigation, warm, with a cool spell that slows winter growth |
| Ground this covers | 3 kinds of ground. The season below is the largest that farms — about 53% of this area. |
| 53% | too dry for rain-fed cropping without irrigation; warm, with a cool spell that slows winter growth 84 growing days · about 210 mm |
|---|---|
| 40% | enough rain for one short crop, and only if timed to it; warm, with a cool spell that slows winter growth 139 growing days · about 330 mm · April to September |
| 4% | enough rain for one short crop, and only if timed to it; cool for part of the year, so frost sets the planting date 143 growing days · about 330 mm · April to September |
last updated 17 September 2026
Sloping ground holds back about 35% of yield here.
What maize needs to grow here
| Soil it likes | well-drained sandy loam, loam or clay loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.5 and 7.5 |
| Spacing | 75 cm between rows, 25 cm between plants |
| Feed it most with | sulphur, zinc and magnesium |
What it takes to grow maize in West Coast
| Planting material | About 53,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 101 kg per hectare |
| Phosphate (P₂O₅) | About 50 kg per hectare |
| Potash (K₂O) | About 38 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 | 82–165 days per hectare, by hand |
These are the nutrients a maize 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 Maize with a plan, not a guess
Everything above describes West Coast 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.
Maize 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 maize grow well in West Coast?
West Coast rates as favourable for maize.
When should I plant maize in West Coast?
Typically 9 Aug 2026 to 10 Feb 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across West Coast, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
