Handroanthus impetiginosus, commonly known as the Pink Trumpet Tree, is a deciduous tree native to the Americas from Mexico to Argentina, belonging to the Bignoniaceae family. It is renowned for its spectacular rose-pink to lavender trumpet-shaped flowers that bloom in late winter to spring and is the national tree of Paraguay. Seeds germinate readily with high germination rates (95%) when provided with proper moisture, warmth, and light, making it relatively easy to propagate from seed.
Before sowing
Seeds benefit from warm soaking in water for 24 hours. No cold stratification is necessary; cold stratification is optional and not standard practice. Some sources mention seeds have high lipid content and short lifespan under storage.
Sowing
What to expect
Tips
Best sown fresh or within a few months of collection as seeds have high lipid content and relatively short storage life. Soak seeds in room-temperature water for 24 hours before sowing. Use bright, indirect light for germination; avoid direct hot sunlight. Keep substrate consistently moist but not waterlogged. Germination typically occurs in 10-12 days to 3 weeks. Seedlings grow rapidly and are usually ready to transplant within 4 months. Use transparent covers or plastic domes to maintain humidity during germination. Do not allow substrate to dry out between waterings.
Sources: PFAF Plant Database, Monaco Nature Encyclopedia, Handroanthus impetiginosus research publications on seed germination and propagation, University of Hawaii tropical plant guides
