Loading…

Loading…

Farmlens Eyes On Earth
Welcome
Sign in to continue
Login Register
Download PDF
Lablab (hyacinth bean)

Crop details

Lablab (hyacinth bean)

Lablab purpureus
Family: Fabaceae

Quick stats

Family Fabaceae
Typical harvest 2.1 t/ha
Varieties 3
Pests & diseases 6
Seasons 6

Crop profile

Growth habit climber
Days to harvest 90-150
Main uses Pulse; forage; vegetable
Pollination insect
Origin / where it grows Africa/Asia tropics

Weather, soil & spacing

Best temperature 20–30 °C
Rainfall 600–900 mm/yr
Altitude 0–1800 m
Best pH 6–7
Soil type Well-drained loam
Row spacing 75 cm
Plant spacing 45 cm
Planting depth 3 cm
Seed rate 25 kg/ha
Nursery days

Simple notes for farmers

About the crop: This crop has a growth habit described as "climber". You can normally start harvesting about 90-150 days after planting, depending on care and variety.

Main use: Farmers mostly grow this crop for pulse; forage; vegetable.

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: Africa/Asia tropics It is grouped under: Legumes & Pulses.

Best climate: This crop does well in warm areas where the temperature is usually between 20 and 30 degrees Celsius. It prefers places that receive around 600 to 900 millimetres of rain in a year. It can grow from near sea level up to about 1800 metres above sea level.

Soil: The crop grows best in slightly acidic to near neutral soils, with a pH of about 6 to 7. It does well in well-drained loam. Good drainage is important, so avoid waterlogged spots.

Plant spacing: Plant in rows about 75 centimetres apart, and leave about 45 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 25 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)

Planting: Direct-seed at onset of rains on a fine seedbed. Provide stakes/trellis for vining types. Keep weed-free for first 4–6 weeks.
Transplanting: Transplant uncommon; if used, handle taproot gently.
Irrigation: Irrigate for establishment and during flowering/pod fill in dry spells.
Fertigation: Low N demand (N-fixing). If fertigating, use small N doses and adequate K.
Pest scouting: Scout for pod borers, aphids, beetles, and foliar diseases; remove infested pods and maintain hygiene.
Pruning: Train vines on stakes/trellis; light tip-pinching can encourage branching.
Harvest: Pick green pods tender for vegetable use; for dry seed, harvest when pods turn brown and rattle.
Postharvest: Dry seed to ≤12% moisture; store cool and dry. For forage, cut at early flowering.

Nutrient schedule (mbolea kwa hatua)

# Stage DAP Product Rate Targets (kg/ha) Notes
1 Basal 0 NPK 17-17-17 60 kg/ha N: —, P₂O₅: —, K₂O: — Or DAP 18-46-0 @ 50–60 kg/ha; inoculate seed where possible
2 Topdress (opt.) 25 CAN 26% N (light) 30 kg/ha N: —, P₂O₅: —, K₂O: — Only if leaves pale and nodules absent/weak
3 K boost (opt.) 40 MOP (KCl) 30 kg/ha N: —, P₂O₅: —, K₂O: — For intensive vegetable/forage use

Nutrient requirements

Nutrient Stage Amount Unit
P₂O₅ Basal 25 kg/ha
K₂O Basal 20 kg/ha
N Topdress 15 kg/ha
K₂O Flowering 20 kg/ha

Field images (picha shambani)

Lablab (hyacinth bean)
Name Country Maturity Traits
Local Lablab KE 120 Dual purpose
Rongai (forage type) KE 120 Vigorous vine; high biomass; forage/cover
Local lablab (grain) KE 110 Dual-purpose; edible dry seed
Stage Product Rate (kg/ha) Notes
Basal NPK 17-17-17 60 At sowing; band or broadcast
Topdress CAN 26% N (optional) 30 Only if poor nodulation
Flowering MOP (KCl) (optional) 30 Support pod/leaf production
Name Type Symptoms Management
Pod borer pest Bored pods Timely picking; IPM
Pod borer (Maruca spp.) pest Bored pods; webbing; seed damage Timely picking; sanitation; rotate actives if spraying
Aphids pest Curling; honeydew/sooty mold Encourage natural enemies; soft sprays; control ants
Beetles/defoliators pest Leaf holes; defoliation Scouting; spot treatments; hand-pick small outbreaks
Anthracnose/leaf spots disease Spots/lesions on leaves & pods Rotation; airflow; protectants if severe
Powdery mildew disease White powdery growth on leaves Spacing; sulfur or labeled fungicides
System Typical Min Max Notes
rainfed 1.2 0.6 2
rainfed grain (dry seed) 1.2 0.6 2 Varies with support/management
forage biomass (dry matter) 4 2.5 6 Cut at early flowering
Country Region Planting Harvest
KE Western Mar–Apr Jul–Oct
KE Western & mid-altitudes (long rains) Mar–Apr Jul–Oct
KE Western & mid-altitudes (short rains) Oct–Nov Feb–Apr
UG Central/Eastern (1st season) Mar–Apr Jul–Sep
UG Central/Eastern (2nd season) Aug–Sep Dec–Feb
TZ Northern unimodal Nov–Dec Mar–May
Country Region Suitability
KE Arid/semi-arid w/out irrigation Low
KE Poorly drained wetlands Low
KE Western High
KE Western; Nyanza; mid-altitude humid High
TZ Northern & Lake zones High
UG Central & Eastern sub-humid High