Hardenbergia violacea, an Australian native vine also known as Purple Coral Pea or Happy Wanderer, is an evergreen climber with distinctive purple pea-shaped flowers blooming in winter and spring. The species has a hard seed coat requiring scarification before sowing, typically breaking dormancy within 14-21 days when provided with warm temperatures around 20-22°C. This hardy, low-maintenance plant is widely cultivated as an ornamental and is valued for attracting native bees and butterflies.
Before sowing
Scarification is mandatory due to hard seed coat. Use boiling water treatment (5-15 minutes) followed by 24-hour soak, or mechanical abrasion with sandpaper. Without pre-treatment, seeds may remain dormant for years.
Sowing
What to expect
Tips
Scarify seeds by pouring boiling water over them and allowing 24-hour soak before planting. Sow seeds lightly covered (approximately 3mm depth) in moist seed-raising mix. Maintain high humidity and constant moisture during germination. Provide bright light without direct sun exposure. Germinate at soil temperatures of 20-22°C for optimal results. Do not discard non-germinated seeds immediately; they may remain dormant for extended periods until conditions are ideal. Smoke treatment may enhance germination rates. Transplant seedlings outdoors once they reach 5-10cm height, after 4-6 weeks of acclimation. Seeds retain viability for many years in storage.
Sources: Australian Seed, The Seed Collection, Gardening Know How, Australian Native Plants Society (ANPSA), Sheffield's Seed Company, Grokipedia
