Quick stats
| Family | Fabaceae |
|---|---|
| Typical harvest | 1.5 t/ha |
| Varieties | 2 |
| Pests & diseases | 6 |
| Seasons | 3 |
Crop profile
| Growth habit | annual |
|---|---|
| Days to harvest | 100-150 |
| Main uses | Pulse; forage |
| Pollination | insect |
| Origin / where it grows | Temperate regions |
Weather, soil & spacing
| Best temperature | 10–20 °C |
|---|---|
| Rainfall | 500–800 mm/yr |
| Altitude | 800–2600 m |
| Best pH | 5.5–6.8 |
| Soil type | Well-drained; tolerates poor soils |
| Row spacing | 40 cm |
| Plant spacing | 15 cm |
| Planting depth | 3 cm |
| Seed rate | 80 kg/ha |
| Nursery days | — |
Simple notes for farmers
About the crop: This crop is annual. You plant, grow and harvest it in one main season, then plant again. You can normally start harvesting about 100-150 days after planting, depending on care and variety.
Main use: Farmers mostly grow this crop for pulse; forage.
Pollination: This crop is mainly pollinated by insect. Keeping flowers healthy and having insects like bees in the field helps improve fruit set and yields.
Where it grows: Temperate regions It is grouped under: Legumes & Pulses.
Best climate: This crop does well in warm areas where the temperature is usually between 10 and 20 degrees Celsius. It prefers places that receive around 500 to 800 millimetres of rain in a year. It can grow from near sea level up to about 2600 metres above sea level.
Soil: The crop grows best in slightly acidic to near neutral soils, with a pH of about 5.5 to 6.8. It does well in well-drained; tolerates poor soils. Good drainage is important, so avoid waterlogged spots.
Plant spacing: Plant in rows about 40 centimetres apart, and leave about 15 centimetres between plants in the row. This gives each plant enough space for roots and canopy to spread.
Planting depth: Dig planting holes or furrows about 3 centimetres deep so the roots sit firmly in the soil but are not buried too deep.
Seed or planting material: Use around 80 kilograms of seed or planting material per hectare. Spread or plant evenly so the field has a good stand without being overcrowded.
Farmer guide (mwongozo wa mkulima)
Nutrient schedule (mbolea kwa hatua)
| # | Stage | DAP | Product | Rate | Targets (kg/ha) | Notes |
|---|---|---|---|---|---|---|
| 1 | Basal | 0 | NPK 15-15-15 | 50 kg/ha | N: —, P₂O₅: —, K₂O: — | Coat just before sowing; avoid sun |
| 2 | Basal P at planting | 0 | TSP 0-46-0 or SSP | 80 kg/ha (product) | N: —, P₂O₅: 30, K₂O: — | Band below seed; keep separate from inoculant |
| 3 | Early vegetative S/Ca | 20 | Gypsum (CaSO4·2H2O) | 100 kg/ha | N: —, P₂O₅: —, K₂O: — | Supports nodulation; seed quality |
| 4 | K top-up (if needed) | 35 | MOP or SOP | 60 kg/ha (product) | N: —, P₂O₅: —, K₂O: 20 | Prefer SOP on chloride-sensitive soils |
Nutrient requirements
| Nutrient | Stage | Amount | Unit |
|---|---|---|---|
| N | Basal | 10 | kg/ha |
| P₂O₅ | Basal | 20 | kg/ha |
| K₂O | Basal | 20 | kg/ha |
| N | Topdress | 0 | kg/ha |
| P₂O₅ | Topdress | 10 | kg/ha |
| K₂O | Topdress | 20 | kg/ha |
| N | Pod_fill | 0 | kg/ha |
| P₂O₅ | Pod_fill | 0 | kg/ha |
| K₂O | Pod_fill | 20 | kg/ha |
Field images (picha shambani)
| Name | Country | Maturity | Traits |
|---|---|---|---|
| Sweet Lupin | KE | 130 | Low alkaloid |
| Narrow-leaf lupin (local) | ET | 110 | Early; drought tolerant |
| Stage | Product | Rate (kg/ha) | Notes |
|---|---|---|---|
| Basal | NPK 15-15-15 | 50 | |
| Basal | TSP 0-46-0 (or SSP) | 65 | Starter P; banded |
| Vegetative | Gypsum | 100 | Supplies Ca and S; supports nodulation |
| Pod fill | Sulfate of potash | 50 | Only if K is deficient |
| Name | Type | Symptoms | Management |
|---|---|---|---|
| Aphids | pest | Honeydew; sooty mold | Natural enemies; spot sprays |
| Pod borers (Helicoverpa spp.) | pest | Pod/seed feeding | Flower–pod scouting; targeted control if needed |
| Anthracnose | disease | Stem crooks; lesions; dieback | Clean seed; avoid spread; resistant types; fungicide if severe |
| Sclerotinia stem rot | disease | Wilting; white mycelium; sclerotia | Rotation; canopy airflow; targeted sprays |
| Root rots (Rhizoctonia/Phytophthora) | disease | Damping-off; root lesions | Well-drained fields; avoid compaction; seed treatments |
| Weed competition | pest | Stunting; yield loss | Pre/post-emergence control; narrow rows |
| System | Typical | Min | Max | Notes |
|---|---|---|---|---|
| rainfed highland | 1.5 | 0.8 | 2.5 | Inoculation + P improve yields |
| Country | Region | Planting | Harvest |
|---|---|---|---|
| KE | Highlands | May–Jun | Sep–Nov |
| KE | Highlands (long rains) | Mar–Apr | Aug–Sep |
| KE | Highlands (short rains) | Oct–Nov | Feb–Mar |
| Country | Region | Suitability |
|---|---|---|
| KE | Highlands | Medium |
| KE | Highlands & cool mid-altitudes | High |
| KE | Hot lowlands (>28 °C mean) | Low |
| TZ | Northern highlands | High |