Quick stats
| Family | Malvaceae |
|---|---|
| Typical harvest | 9.0 t/ha |
| Varieties | 3 |
| Pests & diseases | 5 |
| Seasons | 6 |
Crop profile
| Growth habit | annual |
|---|---|
| Days to harvest | 120-180 |
| Main uses | Fiber; biomass |
| Pollination | insect |
| Origin / where it grows | Africa/Asia tropics |
Weather, soil & spacing
| Best temperature | 24–32 °C |
|---|---|
| Rainfall | 700–1200 mm/yr |
| Altitude | 0–1600 m |
| Best pH | 6–7 |
| Soil type | Fertile loam |
| Row spacing | 60 cm |
| Plant spacing | 20 cm |
| Planting depth | 2 cm |
| Seed rate | 15 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 120-180 days after planting, depending on care and variety.
Main use: Farmers mostly grow this crop for fiber; biomass.
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: Oil & Industrial.
Best climate: This crop does well in warm areas where the temperature is usually between 24 and 32 degrees Celsius. It prefers places that receive around 700 to 1200 millimetres of rain in a year. It can grow from near sea level up to about 1600 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 fertile loam. Good drainage is important, so avoid waterlogged spots.
Plant spacing: Plant in rows about 60 centimetres apart, and leave about 20 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 2 centimetres deep so the roots sit firmly in the soil but are not buried too deep.
Seed or planting material: Use around 15 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 | 80 kg/ha | N: —, P₂O₅: —, K₂O: — | Band or broadcast and incorporate |
| 2 | Topdress | 35 | Urea | 60 kg/ha | N: —, P₂O₅: —, K₂O: — | Apply on moist soil; avoid leaf contact |
| 3 | Topdress 2 (optional) | 50 | Urea (light) | 30 kg/ha | N: —, P₂O₅: —, K₂O: — | Only if crop vigor is low |
Nutrient requirements
| Nutrient | Stage | Amount | Unit |
|---|---|---|---|
| N | Basal | 40 | kg/ha |
| P₂O₅ | Basal | 20 | kg/ha |
| K₂O | Basal | 30 | kg/ha |
| N | Topdress | 30 | kg/ha |
| K₂O | Topdress | 20 | kg/ha |
| N | Late | 20 | kg/ha |
Field images (picha shambani)
| Name | Country | Maturity | Traits |
|---|---|---|---|
| Local Kenaf | KE | 150 | Fiber yield |
| Local fiber type | KE | 120 | Tall; good bast yield |
| Dual-purpose (fiber/biomass) | TZ | 110 | Moderate height; good biomass |
| Stage | Product | Rate (kg/ha) | Notes |
|---|---|---|---|
| Basal | NPK 15-15-15 | 80 | |
| Basal | NPK 17-17-17 | 100 | At sowing |
| Topdress | Urea 46% N or CAN 26% N | 60 | ~30 DAP |
| Topdress | Urea (optional) | 30 | ~50 DAP if needed |
| Name | Type | Symptoms | Management |
|---|---|---|---|
| Stem borers | pest | Bored stems | Rotation; timely harvest |
| Hairy caterpillar/defoliators | pest | Leaf stripping; skeletonization | Early scouting; hand-pick or targeted sprays; conserve natural enemies |
| Aphids & whiteflies | pest | Honeydew/sooty mold; virus transmission | Monitor; control ants; selective insecticides if thresholds exceeded |
| Stem/foot rot (Fusarium/Pythium) | disease | Stem base rot; wilting | Rotation; well-drained fields; avoid injury; rogue plants |
| Leaf spots (Cercospora/Alternaria) | disease | Spots; premature defoliation | Spacing; sanitation; protectants if severe |
| System | Typical | Min | Max | Notes |
|---|---|---|---|---|
| rainfed | 10 | 6 | 15 | Stem biomass (fresh) |
| rainfed smallholder | 2 | 1.2 | 3 | Bast fiber |
| biomass (stems, fresh) | 15 | 10 | 25 | Whole stem fresh biomass |
| Country | Region | Planting | Harvest |
|---|---|---|---|
| KE | Humid lowlands | Mar–Apr | Jul–Oct |
| KE | Low to mid-altitudes (long rains) | Mar–Apr | Jul–Sep |
| KE | Low to mid-altitudes (short rains) | Oct–Nov | Feb–Mar |
| UG | Eastern/Central (1st rains) | Mar–Apr | Jul–Aug |
| UG | Eastern/Central (2nd rains) | Aug–Sep | Dec–Jan |
| TZ | Northern unimodal | Nov–Dec | Mar–May |
| Country | Region | Suitability |
|---|---|---|
| KE | Coastal; Lower Eastern; Lake Basin; mid-altitude warm zones | High |
| KE | Cool highlands >1800 m | Low |
| KE | Humid lowlands | High |
| KE | Poorly drained wetlands | Low |
| TZ | Coast; Morogoro; warm valleys | High |
| UG | Eastern & Central warm sub-humid | High |