Pomelo: The Grandfather of All Citrus — Origin, History, and How to Grow
The pomelo is one of the ancestor citrus from which oranges, grapefruit, and mandarins all descend. Its 4,000-year story, and how to grow your own.
The pomelo (Citrus maxima) is the largest citrus fruit in the world — individual fruits can weigh 1-2 kg. More importantly, it is one of only three true ancestral citrus species (along with citron and mandarin); nearly every other citrus fruit you eat is a hybrid descended in part from the pomelo. Without the pomelo there would be no oranges, no grapefruit, and no lemons.
Origin and native range
The pomelo originated in Southeast Asia — modern-day Malaysia, southern China, Vietnam, and Thailand. Wild Citrus maxima still grows in the rainforests of this region. Cultivation goes back at least 4,000 years; the pomelo is mentioned in Chinese texts from the Han Dynasty and was a luxury fruit at imperial courts.
How it spread
The pomelo reached the Mediterranean via Arab and Persian traders before the 1000s CE. It moved more slowly than other citrus partly because it is large, fragile to handle, and the trees are demanding. The pomelo reached the Americas in the 1600s through trade with the West Indies. The English name "shaddock" comes from Captain Philip Shaddock, who reportedly carried pomelo seeds from Southeast Asia to Barbados in the 1690s — these are the same seeds that later produced the grapefruit hybrid.
Where pomelos grow today
China is by far the largest producer; pomelos are central to Chinese Lunar New Year celebrations (the round shape symbolizes family unity). Vietnam, Thailand, the Philippines, and Malaysia are major regional producers. The fruit is becoming more popular in U.S. and European markets but is still considered exotic in the West.
How to grow pomelos
- Climate: Subtropical to tropical, more heat-loving than oranges. USDA Zones 9-11.
- Soil: Deep, well-drained loam, pH 6.0-7.0. Pomelos have deep root systems and don't do well in shallow soil.
- Sun: Full sun, 8+ hours.
- Planting: From a grafted tree.
- Spacing: 8-10m between standard trees — they get big.
- Watering: Heavy and consistent during fruit development.
- Fertilizing: Citrus formula 3x per year.
- Harvest: Fruits ripen 6-8 months after flowering. Color shifts from green to pale yellow.
- First fruit: 4-6 years from a grafted tree.
Varieties
- Honey White (Vietnam) — sweet, pale flesh, the most-exported variety.
- Tambun (Malaysia) — pink-fleshed, very sweet.
- Khao Yai (Thailand) — bright yellow flesh, the Thai favorite.
- Chandler (USA) — California hybrid, large fruit, sweet pink flesh.
- Hirado Buntan (Japan) — small, mild, often eaten with rice as part of meals.
How to eat a pomelo
Score the very thick rind in quarters from top to bottom, peel back. Each segment has a tough membrane; tear or cut it off and pop out the juice-filled vesicles. The flesh is firmer and less acidic than grapefruit — mild sweet, slightly tart. Excellent in Southeast Asian salads (Thai yum som-o, Cambodian num bao yor sets) where the firm flesh holds up against fish sauce and chili.
Nutrition
About 38 calories per 100g, low in sugar, high in vitamin C (over 60% daily value per 100g) and potassium. Very low glycemic load. Also rich in fiber from the thick pith.
Bottom line
Older than every citrus you know. Plant a pomelo and you are growing the grandfather of half the supermarket fruit aisle.