Backhousia citriodora, commonly known as Lemon Myrtle, is an evergreen Australian native shrub or small tree endemic to subtropical Queensland rainforests, prized for its intensely fragrant lemon-scented leaves and culinary and medicinal applications. Seed germination is challenging and variable, with fresh seeds requiring warm, moist conditions and careful pre-treatment to achieve germination rates of 20-60%, making cutting propagation preferred for commercial cultivation.
Before sowing
Soak seed capsules in lukewarm water for 12-24 hours. Surface sow seeds on well-draining medium with minimal soil coverage (approximately 2mm)
Sowing
What to expect
Tips
Germination is notoriously slow and variable (14-56 days). Use fresh seeds whenever possible as viability declines rapidly. Keep soil consistently moist but not waterlogged by misting regularly. Maintain warmth (22-25°C) and bright conditions without direct sunlight. Smoke treatments improve germination rates; alternatively, mist seedlings weekly. Low seed fill (8-16.5% of capsules) is normal and not indicative of poor viability. After germination, transfer seedlings to individual containers when 5-10cm tall and acclimate gradually over 45-60 days before hardening off. Protect from frost during the first 1-2 years of growth. Expect slow growth; seedlings may take 3-4 years to reach maturity. Consider using semi-hardwood cuttings as an alternative propagation method for more reliable results.
Sources: VIRIAR, The Seed Vine, Australian Seed, ABCeeds, The Seed Collection, Grokipedia, Chicago Botanic Garden, Growing Native Plants Australia, Wikipedia
