Divisi
When to plant Grapefruit in Antsirabe I
Vakinankaratra, Madagascar
Grapefruit (Citrus paradisi) is a big, dense evergreen citrus tree you plant once and pick from for decades.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant (establish) | 26 Sep 2026 – 16 Oct 2026 open now | 21 Jan 2026 – 1 Jan 2027 |
| Expected harvest | about 10.8 t/ha | about 21.6 t/ha |
| Bearing cycle | 360–420 days per crop once the plant is established. Planting to the first harvest takes longer than one cycle. | |
| Work it takes | 74–148 days per hectare, by hand | |
| Rain meets its needs | 77% | |
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 26 Sep 2026. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Antsirabe I 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 16 Oct 2026 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Antsirabe I
| Rain and temperature | 76% |
|---|---|
| The soil | 76% |
| The lie of the land | 76% |
For grapefruit in Antsirabe I, rain and temperature is the tightest of the three at 76%. This one is fixed. It is why the planting window above is where it is — hitting those dates is the whole of your control here.
The 2026/27 season in Antsirabe I
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | October 2026 to June 2027 |
| Rain in a typical year | About 1,339 mm |
| 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 +1.2 °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 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 full main crop; warm all year, so nothing but rain ends the season 242 growing days · about 1,330 mm · October to June |
|---|---|
| 36% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 239 growing days · about 1,320 mm · October to June |
last updated 17 September 2026
Temperature holds back about 40% of yield here.
What grapefruit needs to grow here
| Soil it likes | well-drained loam or sandy loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 6.0 and 6.5 |
| Spacing | 650 cm between rows, 650 cm between plants |
| Feed it most with | nitrogen, potassium, magnesium, zinc and boron |
What it takes to grow grapefruit in Antsirabe I
| Planting material | About 240 plants per hectare |
|---|---|
| Nitrogen (N) | About 22 kg per hectare |
| Phosphate (P₂O₅) | About 4 kg per hectare |
| Potash (K₂O) | About 32 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 | 74–148 days per hectare, by hand |
These are the nutrients a grapefruit 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 Grapefruit with a plan, not a guess
Everything above describes Antsirabe I 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.
Grapefruit 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 grapefruit grow well in Antsirabe I?
Antsirabe I rates as favourable for grapefruit.
When should I plant grapefruit in Antsirabe I?
Typically 26 Sep 2026 to 16 Oct 2026, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Antsirabe I, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
