Divisi
When to plant Irish potato in Blantyre
Southern, Malawi
Known here as mbatata
The Irish potato (mbatatisi, ikirayi, viazi mviringo) is a cool-weather crop grown for the tubers that swell underground — it is not a grain, and it is not the same plant as sweet potato.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 5 Jan 2027 – 4 Feb 2027 opens in 14 weeks | 22 Mar 2027 – 30 Jun 2027 |
| Expected harvest | about 32.4 t/ha | about 41.7 t/ha |
| Harvest | From 16 Mar 2027 to 14 Jun 2027, depending on the planting date | |
| Ready to harvest | 70–130 days after planting | |
| Work it takes | 110–185 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 5 Jan 2027. That is the point in the window where the rains are most reliably established.
No seasonal forecast reaches Blantyre yet, so these dates follow the rains it usually gets rather than this year's.
Planting after 4 Feb 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Blantyre
| Rain and temperature | 96% |
|---|---|
| The soil | 76% |
| The lie of the land | 88% |
For irish potato in Blantyre, 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 Blantyre
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | November 2026 to April 2027 |
| Rain in a typical year | About 952 mm |
| This season's rain | Leaning dry — January, February and December look short of rain. Plant at the early end of the window, favour quicker and more drought-tolerant crops, and keep moisture in the soil: mulch, and weed early. |
| This season's heat | Hotter than usual — about +1.5 °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 | 2 kinds of ground. The season below is the largest that farms — about 64% of this area. |
| 64% | enough rain for one short crop, and only if timed to it; warm all year, so nothing but rain ends the season 171 growing days · about 930 mm · November to April |
|---|---|
| 34% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 216 growing days · about 1,040 mm · October to June |
last updated 17 September 2026
Frost and pest pressure hold back about 15% of yield here.
What irish potato needs to grow here
| Soil it likes | well-drained loam or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Spacing | 75 cm between rows, 28 cm between plants |
| Feed it most with | potassium and magnesium |
What it takes to grow irish potato in Blantyre
| Planting material | About 47,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 107 kg per hectare |
| Phosphate (P₂O₅) | About 32 kg per hectare |
| Potash (K₂O) | About 188 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 | 110–185 days per hectare, by hand |
These are the nutrients a irish 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 Irish potato with a plan, not a guess
Everything above describes Blantyre 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.
Irish 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 irish potato grow well in Blantyre?
Blantyre rates as favourable for irish potato.
When should I plant irish potato in Blantyre?
Typically 5 Jan 2027 to 4 Feb 2027, typical season.
Is this exact for my own field?
No — these are readings taken across Blantyre, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
