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Grapefruit

Crop details

Grapefruit

Citrus × paradisi
Family: Rutaceae

Categories

Quick stats

Family Rutaceae
Typical harvest 16.0 t/ha
Varieties 2
Pests & diseases 3
Seasons 1

Crop profile

Growth habit perennial
Days to harvest 365+
Main uses Citrus fruit
Pollination insect
Origin / where it grows Americas; tropics/subtropics

Weather, soil & spacing

Best temperature 18–28 °C
Rainfall 800–1200 mm/yr
Altitude 0–1600 m
Best pH 6–7
Soil type Well-drained loam
Row spacing 700 cm
Plant spacing 700 cm
Planting depth 60 cm
Seed rate kg/ha (check local recommendation)
Nursery days 180

Simple notes for farmers

About the crop: This crop is perennial, which means once you plant it, the same plant can keep producing for many years. You can normally start harvesting about 365+ days after planting, depending on care and variety.

Main use: Farmers mostly grow this crop for citrus fruit.

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: Americas; tropics/subtropics It is grouped under: Fruits & Nuts.

Best climate: This crop does well in warm areas where the temperature is usually between 18 and 28 degrees Celsius. It prefers places that receive around 800 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 well-drained loam. Good drainage is important, so avoid waterlogged spots.

Plant spacing: Plant in rows about 700 centimetres apart, and leave about 700 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 60 centimetres deep so the roots sit firmly in the soil but are not buried too deep.

Seed or planting material: Use good quality seed or healthy planting material. Follow local extension advice for the exact amount per hectare.

Nursery period: If you raise seedlings in a nursery, keep them there for about 180 days before transplanting to the main field, when they are strong and healthy.

Farmer guide (mwongozo wa mkulima)

Planting: Plant healthy Grapefruit seedlings or grafted plants at onset of rains in prepared pits.
Transplanting: Handle Grapefruit rootballs carefully and water well after planting.
Irrigation: Maintain steady moisture during establishment and fruit development of Grapefruit.
Fertigation: Split nutrients through active growth and fruit development in Grapefruit.
Pest scouting: Scout Grapefruit regularly for fruit flies, scales, borers, and foliar diseases.
Pruning: Prune Grapefruit to maintain canopy light, height, and sanitation.
Harvest: Harvest Grapefruit at the right maturity stage for fresh-market quality.
Postharvest: Keep Grapefruit shaded and cool after harvest to preserve market quality.

Nutrient schedule (mbolea kwa hatua)

# Stage DAP Product Rate Targets (kg/ha) Notes
1 Basal 0 NPK 17-17-17 200 kg/ha N: —, P₂O₅: —, K₂O: — Improve rooting environment for Grapefruit.
2 Pre-fruiting 90 NPK 17-17-17 200 kg/ha N: 34, P₂O₅: 34, K₂O: 34 Balanced nutrient support for Grapefruit.

Nutrient requirements

Nutrient Stage Amount Unit
N Basal 60 kg/ha
P₂O₅ Basal 40 kg/ha
K₂O Basal 90 kg/ha
N Fruiting 40 kg/ha
K₂O Fruiting 50 kg/ha

Field images (picha shambani)

Grapefruit
Primary
Grapefruit imported image
Grapefruit imported image
Grapefruit imported image
Grapefruit imported image
Name Country Maturity Traits
Marsh KE 900 Seedless; juice
Star Ruby KE 365 Red-fleshed cultivar for fresh and juice markets.
Stage Product Rate (kg/ha) Notes
Planting Well-rotted manure 8000 Organic matter for Grapefruit establishment.
Pre-fruiting NPK 17-17-17 200 Balanced fertilizer ahead of major Grapefruit crop load.
Name Type Symptoms Management
Citrus scab disease Corky lesions Sanitation; protectants
Fruit flies pest Stings, larval feeding, and rotting fruits. Field sanitation, trapping, and timely harvest.
Anthracnose and fruit rots disease Lesions on flowers, leaves, or fruits reducing quality. Prune for airflow, keep orchards clean, and protect during wet periods.
System Typical Min Max Notes
orchard 18 10 30
Managed orchard production 14 8.4 22.4 Typical orchard yield for Grapefruit under practical management.
Country Region Planting Harvest
KE Managed Orchard Zones Mar-Apr or Oct-Nov Depends on variety and agroecology
Country Region Suitability
KE Managed Orchard Zones Medium
KE Warm mid-altitudes High