A West African staple grain, per the crop database's own description -- genuinely fast growing, naturally gluten free, and a genuine low input crop. It's the quickest-maturing grain on this whole hub, a real practical advantage where a short, reliable growing window matters more than raw yield.
Water need
A genuinely low-input, low-water grain, consistent with the crop database's own "low input crop" description.
Calories at a glance
3,620 kcal/kg -- one of the most calorie-dense crops on this entire site, in line with the other grains on this hub (scale is log-based across all 55 core crops in the calculator).
Temperature Range by Month
Month on the bottom, temperature up the side. The pale green background is what the plant can survive at all -- fatal above or below it, labelled directly on the chart where that applies to your zone. The coral band is its ideal range, and only fades in during the months this zone would actually have the crop in the ground -- reusing the exact same sowing/harvesting data as the calendar further down the page. The blue line is real monthly climate data (not a modelled estimate) for a representative rural/agricultural location in this zone -- a small farming town or agricultural research station rather than a major city, to avoid the warmer bias city weather stations have. For the actual verdict on how well this crop does in your zone, see the badge at the top of the page -- that's based on the site's own researched yield figures, not this chart.
Quick Start: Sowing to Storage
- Broadcast or drill into warm soil. Broadcast or drill the fine seed shallowly into warm soil once frost risk has passed, since fonio is a genuine warm-season crop.
- Let the crop grow away quickly. Fonio establishes and matures fast, so it needs comparatively little attention through its short growing period.
- Let seed heads mature and dry. Allow the fine seed heads to mature and dry fully on the plant before cutting.
- Cut, thresh and winnow. Cut the dry plants, thresh to release the tiny grain, then winnow carefully given how fine and light it is.
- Store dry. Store the cleaned grain somewhere cool, dark and dry, where it keeps well as a genuine long-term staple.
Sowing & Harvesting Calendar
Pick your zone under "Temperature Range by Month" above and this updates too. Fonio's harvest windows here are consistently among the shortest on this hub, reflecting its genuinely fast maturity.
Calories & Yield
Tropical gives the best yield here, and it's not viable outdoors in the Boreal or Alpine zones.
| Climate Zone | Yield per plant | Calories per plant | Viability |
|---|---|---|---|
| Tropical / Humid | 2.00 kg | 7,240 kcal | Viable -- best yield |
| Subtropical | 1.80 kg | 6,516 kcal | Viable |
| Mediterranean | 1.50 kg | 5,430 kcal | Viable |
| Temperate Maritime | 0.48 kg | 1,737.6 kcal | Challenging (60% yield) |
| Temperate Continental | 0.72 kg | 2,606.4 kcal | Challenging (60% yield) |
| Cool / Boreal | 0.00 kg | 0 kcal | Not viable outdoors |
| Arid / Semi-Arid | 1.50 kg | 5,430 kcal | Viable |
| Highland / Alpine | 0.00 kg | 0 kcal | Not viable outdoors |
Figures per plant sown, from the site's own crop database. Maritime and Continental already reflect the 60% penalty applied to challenging zones.
A note on varieties: fonio is mostly grown as regional landrace populations rather than widely marketed named cultivars -- real, verifiable named-variety diversity for home growers is genuinely thin.
Seed Saving -- Quick Guide
Fonio is self-pollinating with very low crossing risk. The real skill is harvest timing -- its tiny seed shatters and scatters easily once fully ripe.
SERVINGS, NOT DAILY CALORIES This works out plate-sized servings of fonio from your seed during its fresh harvest window only, not your group's full daily calorie needs. For that, use the main calculator.
Estimated for your selected zone above, using this site's own germination, loss and yield figures for fonio -- a helping is roughly what you'd put on a plate as part of a meal with other veg. Treat it as a planning estimate, not a promise.
Storage & Preservation
The site's own crop data points to the classic dry-grain route: thresh, winnow and store dry.
Kept cool, dry and pest-proof, fonio grain keeps exceptionally well -- a genuinely long-term storable staple, and naturally gluten-free besides.
Growing Fonio Without Bought Inputs
Genuinely one of the lowest-input grains on this whole site, per the crop database's own description -- tolerant of poor soils and needing little in the way of ongoing care.
Birds can target ripening seed heads, much like other small-grained crops on this hub.
Netting over ripening seed heads is a simple, genuinely effective input-free defence against birds.
Frequently Asked Questions
Does fonio cross-pollinate with any other grain on this site?
No. Fonio is Digitaria exilis -- its own genus within the grass family, Poaceae -- genuinely distinct from wheat, oats, barley, maize, rice, teff and pearl millet, all different genera again.
How fast does fonio actually mature?
Genuinely fast -- the crop database calls it out directly: fast growing. It's the quickest-maturing grain on this whole hub, historically valued in West Africa precisely because it can be planted and harvested inside a shorter window than slower staple grains.
Is fonio a low-input crop?
Yes -- the crop database's own description is direct: low input crop. It tolerates poor soils and needs little in the way of ongoing care, part of why it's remained a resilient staple across its native growing regions.