Divisi
When to plant Sweet potato in Lemcen
Batna, Algeria
Sweet potato is a trailing vine you grow from vine cuttings (slips), not from seed and not by planting the root.
| Fit | Favourable |
|---|---|
| When to plant | 21 May 2027 – 10 Jun 2027 opens in 33 weeks |
| Expected harvest | about 30.8 t/ha |
| Harvest | From 19 Aug 2027 to 7 Nov 2027, depending on the planting date |
| Ready to harvest | 90–150 days after planting |
| Work it takes | 70–148 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 10 Jun 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Lemcen is close to normal, so these dates match the pattern the area usually follows.
Planting after 10 Jun 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Lemcen
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 88% |
For sweet potato in Lemcen, 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 season in Lemcen
| Rain in a typical year | About 294 mm |
|---|---|
| This season's rain | Rain close to usual — plan around about 294 mm falling roughly when it always does |
| What that supports | enough rain for one short crop, and only if timed to it, warm, with a cool spell that slows winter growth |
| Ground this covers | 4 kinds of ground. The season below is the largest that farms — about 25% of this area. |
| 25% | enough rain for one short crop, and only if timed to it; warm, with a cool spell that slows winter growth 133 growing days · about 290 mm |
|---|---|
| 25% | enough rain for one short crop, and only if timed to it; cool for part of the year, so frost sets the planting date 113 growing days · about 380 mm |
| 17% | enough rain for one short crop, and only if timed to it; warm, with a cool spell that slows winter growth 146 growing days · about 310 mm · October to March |
| 17% | enough rain for one short crop, and only if timed to it; cool for part of the year, so frost sets the planting date 139 growing days · about 310 mm · October to March |
last updated 18 September 2026
Temperature holds back about 10% of yield here.
What sweet potato needs to grow here
| Soil it likes | well-drained sandy, sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.0 and 6.5 |
| Rain it needs | About 750–1,000 mm across the season |
| Spacing | 100 cm between rows, 30 cm between plants |
| Feed it most with | potassium and nitrogen |
What it takes to grow sweet potato in Lemcen
| Planting material | About 33,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 123 kg per hectare |
| Phosphate (P₂O₅) | About 46 kg per hectare |
| Potash (K₂O) | About 246 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 | 70–148 days per hectare, by hand |
These are the nutrients a sweet 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 Sweet potato with a plan, not a guess
Everything above describes Lemcen 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.
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 sweet potato grow well in Lemcen?
Lemcen rates as favourable for sweet potato.
When should I plant sweet potato in Lemcen?
Typically 21 May 2027 to 10 Jun 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Lemcen, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.