Nyctanthes arbor-tristis, commonly called night-flowering jasmine or parijat, is a tropical shrub or small tree native to South Asia and Southeast Asia, revered for its fragrant white flowers with orange-red centers that bloom at dusk and fall by dawn. Seed germination is straightforward when proper pre-treatment is applied, including scarification and warm temperatures, though seeds exhibit moderate dormancy due to their hard seed coat and inhibitory pericarp. With adequate scarification and soaking, germination is reliable and occurs within 2-6 weeks.
Before sowing
Seeds have hard coats with dormancy factors. Removal of the pericarp (capsule covering) significantly enhances germination. Pre-treatment is essential for reliable germination.
Sowing
What to expect
Tips
Remove seeds from their seed pods (capsules) before sowing, as intact pods inhibit germination. Mechanical scarification (sandpaper, file or knife nick) to expose the seed coat is critical—this can increase germination rates from 10% to 60% or higher. Soak scarified seeds in warm water for 12-24 hours. Use a sterile, well-draining medium and maintain consistent warmth above 22°C (ideal 25-28°C); temperatures below 21°C significantly reduce germination. Keep substrate consistently moist but not waterlogged; use bottom watering to prevent damping-off. Provide bright indirect light; avoid intense direct sun on newly sown seeds. Cover container with transparent plastic or humidity dome and ventilate daily to prevent fungal issues. Germination typically occurs in 2-6 weeks; remove cover once seedlings emerge. When seedlings develop 2-4 true leaves, transplant to small pots with light, well-draining mix. Acclimate seedlings gradually over 2-3 weeks before moving to full sun. Transplant to garden only on cloudy days and protect from direct sun initially. Allow 8-12 weeks acclimatization before planting in permanent location.
Sources: Quora (Nyctanthes arbor-tristis seed germination protocol), ResearchGate (Inhibition of germination in Nyctanthes arbor-tristis by pericarp), Ferri Seeds, Plant World Seeds, DavesGarden forum, Top Tropicals
