Sturt's Desert Pea (Swainsona formosa)
Sturt's Desert Pea, a well-known wildflower and the floral emblem of South Australia, is recognized for its striking deep scarlet or red flowers with a black or dark red center. The individual flowers, about 90 mm long, bloom in clusters of 5 to 6 during late spring and summer. The plant can be an annual or short-lived perennial and is endemic to Australia’s arid regions, thriving in well-drained soils under full sun. It is both drought and frost resistant.
▶ Preferred Growing Conditions:
• Soil: Light to medium, well-drained.
• Sun: Full sun.
• Climate: Grows well in arid regions, tolerates drought and frost.
▲ Sowing Instructions:
• Best Time to Sow: Spring or autumn in temperate climates, avoiding extreme cold or heat.
• Germination Temperature: 18-24°C.
• Pre-Treatment (Scarification):
Swainsona seeds have a hard outer coating that prevents water absorption. Scarify seeds by pre-treating them with hot water.
1. Place seeds in a container.
2. Pour freshly boiled water over the seeds and allow them to soak for 5-10 seconds.
3. Soak the seeds in room temperature water for 8-12 hours.
▲ Sowing Process:
• Depth: Sow seeds at a depth of 5 mm or equivalent to the seed’s width.
• Position: Place the sowing container in a warm, shaded, or semi-shaded area to prevent drying out.
• Moisture: Keep the soil warm and moist, but avoid waterlogging.
Germination:
Seeds typically germinate in 10-21 days at temperatures between 18-24°C. However, some seeds may remain dormant and sprout later when environmental conditions resemble their natural habitat.
☑ Additional Notes:
• Seeds may remain dormant even after initial attempts at germination; do not discard trays too early.
• Always ensure adequate moisture without waterlogging to encourage healthy germination.
• Results may vary depending on regional suitability, and the customer should ensure the growing conditions are appropriate for their area.