Citrus maxima (pomelo) is the largest citrus fruit species and one of three foundational wild citrus ancestors. Native to Southeast Asia, this subtropical evergreen tree produces massive, sweet-sour fruits. Seeds are polyembryonic (multiple viable shoots per seed), producing genetically identical seedlings with virus-free characteristics.
Before sowing
Soak seeds in lukewarm water (25-30°C) for 12-24 hours before planting. Seeds are large and have longer germination periods.
Sowing
What to expect
Tips
Seeds exhibit polyembryony; expect 2-4 seedlings per seed. Place seeds 1 cm deep in moist substrate. Maintain consistent moisture without waterlogging. Bottom heat (25-30°C) accelerates germination. Germination typically occurs within 2-4 weeks but can extend to 6 weeks. Once seedlings emerge, provide bright indirect light and gradually introduce direct sunlight. Transplant when seedlings develop 4-6 true leaves. Keep soil constantly moist during germination. Seedlings are susceptible to damping off; ensure good ventilation. Use acidic potting mix to reduce chlorosis. Seeds from dried-out fruit lose viability; use fresh seeds when possible.
Sources: Plant World Seeds, Greg App, Tropical Plants Database, Missouri Botanical Garden, Growing Fruit, Royal Horticultural Society, Scientific publications on citrus germination
