Divisi
When to plant Garlic in Colla
Bordj Bou Arrer, Algeria
Garlic (Allium sativum) is grown for its compound bulb — the head that splits into the cloves you cook with.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Moderate | |
| When to plant | 26 Sep 2026 – 6 Oct 2026 open now | 10 Feb 2027 – 2 Mar 2027 |
| Expected harvest | 2.7–3.3 t/ha | about 4.5 t/ha |
| Harvest | From 24 Jan 2027 to 4 May 2027, depending on the planting date | |
| Ready to harvest | 120–210 days after planting | |
| Work it takes | 123–248 days per hectare, by hand | |
| Rain meets its needs | 87% | |
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 Colla is close to normal, so these dates match the pattern the area usually follows.
Planting after 6 Oct 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Colla
| Rain and temperature | 60% |
|---|---|
| The soil | 96% |
| The lie of the land | 45% |
For garlic in Colla, 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 Colla
| When the rains are expected | October 2026 to April 2027 |
|---|---|
| Rain in a typical year | About 497 mm |
| This season's rain | Rain close to usual — plan around about 497 mm falling roughly when it always does |
| This season's heat | Hotter than usual — about +1.4 °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 the largest that farms — about 56% of this area. |
| 56% | enough rain for one full main crop; warm, with a cool spell that slows winter growth 208 growing days · about 520 mm · October to April |
|---|---|
| 44% | enough rain for one full main crop; warm, with a cool spell that slows winter growth 201 growing days · about 480 mm · October to April |
last updated 18 September 2026
Temperature holds back about 50% of yield here.
What garlic needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.5 and 7.5 |
| Spacing | 30 cm between rows, 10 cm between plants |
| Feed it most with | sulphur, nitrogen and potassium |
What it takes to grow garlic in Colla
| Nitrogen (N) | About 31 kg per hectare |
|---|---|
| Phosphate (P₂O₅) | About 12 kg per hectare |
| Potash (K₂O) | About 31 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 | 123–248 days per hectare, by hand |
These are the nutrients a garlic 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 Garlic with a plan, not a guess
Everything above describes Colla 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.
Garlic 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 garlic grow well in Colla?
Colla rates as moderate for garlic.
When should I plant garlic in Colla?
Typically 26 Sep 2026 to 6 Oct 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Colla, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
