Divisi
When to plant Watermelon in Harchoun
Chlef, Algeria
Watermelon is a warm-season trailing vine, grown flat along the ground for its big, sweet, thirst-quenching fruit — a cousin of pumpkin, cucumber and melon.
| Fit | Favourable |
|---|---|
| When to plant | 1 May 2027 – 10 May 2027 opens in 30 weeks |
| Expected harvest | about 47.4 t/ha |
| Harvest | From 20 Jul 2027 to 28 Aug 2027, depending on the planting date |
| Ready to harvest | 80–110 days after planting |
| Work it takes | 46–96 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 1 May 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Harchoun is close to normal, so these dates match the pattern the area usually follows.
Planting after 10 May 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Harchoun
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 76% |
For watermelon in Harchoun, the lie of the land is the tightest of the three at 76%. 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 Harchoun
| When the rains are expected | October 2026 to April 2027 |
|---|---|
| Rain in a typical year | About 387 mm |
| This season's rain | Rain close to usual — plan around about 387 mm falling roughly when it always does |
| This season's heat | Hotter than usual — about +1.3 °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, with a cool spell that slows winter growth |
| Ground this covers | 2 kinds of ground. The season below is the largest that farms — about 54% of this area. |
| 54% | enough rain for one short crop, and only if timed to it; warm, with a cool spell that slows winter growth 174 growing days · about 400 mm · October to April |
|---|---|
| 46% | enough rain for one short crop, and only if timed to it; warm, with a cool spell that slows winter growth 172 growing days · about 380 mm · October to April |
last updated 18 September 2026
Frost and pest pressure hold back about 15% of yield here.
What watermelon needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 7.0 |
| Spacing | 240 cm between rows, 140 cm between plants |
| Feed it most with | potassium, boron and calcium |
What it takes to grow watermelon in Harchoun
| Planting material | About 4,000 plants per hectare |
|---|---|
| Nitrogen (N) | About 104 kg per hectare |
| Phosphate (P₂O₅) | About 28 kg per hectare |
| Potash (K₂O) | About 152 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 | 46–96 days per hectare, by hand |
These are the nutrients a watermelon 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 Watermelon with a plan, not a guess
Everything above describes Harchoun 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 watermelon grow well in Harchoun?
Harchoun rates as favourable for watermelon.
When should I plant watermelon in Harchoun?
Typically 1 May 2027 to 10 May 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Harchoun, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
