Divisi
When to plant Roselle in Boffa
Boke, Guinée
Roselle — you may know it as bissap, zobo, karkade or sorrel — is a tall, warm-season hibiscus grown for the fleshy red cups (the calyces) that swell at the base of each flower once the petals drop.
| Measure | Rain-fed | With irrigation |
|---|---|---|
| Fit | Favourable | |
| When to plant | 25 May 2027 – 24 Jul 2027 opens in 34 weeks | 10 Jun 2026 – 28 Oct 2026 |
| Expected harvest | about 1.0 t/ha | same |
| Harvest | From 22 Sep 2027 to 20 Jan 2028, depending on the planting date | |
| Ready to harvest | 120–180 days after planting | |
| Work it takes | 85–175 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 25 May 2027. That is the point in the window where the rains are most reliably established.
This season's rainfall outlook for Boffa is close to normal, so these dates match the pattern the area usually follows.
Planting after 24 Jul 2027 leaves the crop short of season: it runs into the dry months before it has finished filling.
What decides this in Boffa
| Rain and temperature | 96% |
|---|---|
| The soil | 96% |
| The lie of the land | 60% |
For roselle in Boffa, the lie of the land is the tightest of the three at 60%. 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 season in Boffa
| Rainy seasons | One each year — one chance to plant, so timing carries it |
|---|---|
| When the rains are expected | May 2026 to November 2026 |
| Rain in a typical year | About 2,988 mm |
| This season's rain | Rain close to usual — plan around about 2,988 mm falling roughly when it always does |
| This season's heat | Hotter than usual — about +0.8 °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 97% of this area. |
| 97% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 198 growing days · about 3,100 mm · May to November |
|---|---|
| 3% | enough rain for one full main crop; warm all year, so nothing but rain ends the season 193 growing days · about 3,330 mm · May to November |
last updated 17 September 2026
Sloping ground holds back about 20% of yield here.
What roselle needs to grow here
| Soil it likes | well-drained sandy loam or loam soil |
|---|---|
| Soil sourness (pH) | Happiest between pH 5.5 and 7.5 |
| Spacing | 80 cm between rows, 60 cm between plants |
| Feed it most with | nitrogen, phosphorus and potassium |
What it takes to grow roselle in Boffa
| Nitrogen (N) | About 40 kg per hectare |
|---|---|
| Phosphate (P₂O₅) | About 15 kg per hectare |
| Potash (K₂O) | About 55 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 | 85–175 days per hectare, by hand |
These are the nutrients a roselle 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 Roselle with a plan, not a guess
Everything above describes Boffa 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.
Roselle 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 roselle grow well in Boffa?
Boffa rates as favourable for roselle.
When should I plant roselle in Boffa?
Typically 25 May 2027 to 24 Jul 2027, forecast-adjusted.
Is this exact for my own field?
No — these are readings taken across Boffa, not on your field. Soil, slope and rainfall change from one farm to the next. Check your own location to see your own numbers.
