Divisi
When to plant Irish potato in Tipaza
Algeria
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 | 26 Sep 2026 – 15 Nov 2026 open now | 8 Oct 2026 – 22 Mar 2027 |
| Expected harvest | 21.1–21.9 t/ha | about 30.6 t/ha |
| Harvest | From 5 Dec 2026 to 25 Mar 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 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 6 Oct 2026. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Tipaza leans dry, so these dates sit later than the long-run average. Planting on the date you are used to risks germinating into a false start and having to replant.
Planting after 15 Nov 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Tipaza
| Rain and temperature | 88% |
|---|---|
| The soil | 96% |
| The lie of the land | 45% |
For irish potato in Tipaza, 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 2026/27 season in Tipaza
| When the rains are expected | September 2026 to April 2027 |
|---|---|
| Rain in a typical year | About 582 mm in a typical farming district |
| Across its districts | From about 540 mm in the driest of 28 districts to about 749 mm in the wettest |
| This season's rain | Leaning dry — January, February, November 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 +1.0 °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 full main crop, warm, with a cool spell that slows winter growth |
| Ground this covers | 2 kinds of ground. The season below is one typical farming district's, not a figure for the whole of this area. |
| 77% | enough rain for one full main crop; warm, with a cool spell that slows winter growth 215 growing days · about 630 mm · September to May |
|---|---|
| 23% | enough rain for one full main crop; warm, with a cool spell that slows winter growth 213 growing days · about 610 mm · September to April |
last updated 19 September 2026 · from all 28 areas within it
Sloping ground holds back about 35% 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 Tipaza
| Planting material | About 47,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 71 kg per hectare |
| Phosphate (P₂O₅) | About 22 kg per hectare |
| Potash (K₂O) | About 125 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 Tipaza 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 Tipaza?
Tipaza rates as favourable for irish potato.
When should I plant irish potato in Tipaza?
Typically 26 Sep 2026 to 15 Nov 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Tipaza, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
