Acacia dealbata, commonly known as silver wattle or mimosa, is a fast-growing evergreen tree native to southeastern Australia with silvery-gray bipinnate leaves and fragrant golden yellow flowers. The species exhibits physical dormancy due to an impermeable seed coat, but once properly pre-treated through scarification and warm water soaking, seeds germinate readily with success rates exceeding 95% at appropriate temperatures.
Before sowing
Scarification is essential to break physical dormancy caused by impermeable seed coat. Combine mechanical scarification with warm water soaking (12-24 hours) for optimal germination rates exceeding 95%.
Sowing
What to expect
Tips
Use fresh seeds when possible for best results. Perform float test to remove non-viable seeds before treatment. Maintain constant warmth (25°C) and high humidity using covered containers. Provide bright light but avoid direct sun exposure during germination. Acclimate seedlings gradually to full sun conditions before transplanting outdoors. Germination typically occurs within 2-4 weeks with proper pre-treatment. Once seedlings develop several true leaves, thin to prevent overcrowding and maintain air circulation.
Sources: PFAF Plant Database, Reforesta Journal, Sustainability (MDPI), horticultural propagation guides
