Description
A beautiful, small to medium-sized, evergreen or dry deciduous tree with purple flowers, native to forests in southern China and Southeast Asia. Bauhinia purpurea makes a highly desirable ornamental and is widely cultivated in warm temperate and tropical regions in USDA Zones 9 to 11.
Germination Guide
🌍 Indian subcontinent and Myanmar, Southeast Asia
Moderate
Bauhinia purpurea, commonly known as the Purple Orchid Tree or Butterfly Tree, is a tropical deciduous tree native to the Indian subcontinent and Myanmar. The species produces distinctive orchid-like purple flowers and butterfly-shaped bilobed leaves. Seeds have a hard seed coat requiring scarification with hot water or mechanical treatment to achieve reliable germination.
Germination
Germination time
Expect germination in
14 – 90 days
Temperature
Min 20°C
Ideal 22°C
Max 25°C
Substrate moisture
💧 Medium
Seed Pre-treatment
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💧
Soaking — 24 hours
Submerge seeds in hot tap water and leave to soak for 24 hours. Seeds benefit from continued soaking as the water penetrates the hard seed coat.
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🔨
Hot water scarification
Submerge seeds in hot tap water and let stand for 24 hours. Repeat the process for any seeds that have not swollen. If hot water treatment fails, nick the seed coat carefully with a knife and soak again in warm water. Mechanical scarification with sandpaper or a file is also effective.
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📋
Additional notes
Pre-treatment with gibberellic acid (GA3) at 500 ppm for 120 minutes can significantly accelerate germination. Seeds have physical dormancy due to a hard seed coat that requires breaking to allow water penetration.
Substrate & Container
Recommended substrate
Well-draining seed starting mix, peat moss and perlite combination, or sandy compost
Recommended container
Individual 3-inch pots with drainage holes
Growing Tips
Sow pretreated seeds 3/8 inch (approximately 1 cm) deep, tamp the soil, and mulch the seed bed. Maintain consistent moisture and warm temperatures of 20-25°C for optimal germination. Seeds will germinate in 14-90 days depending on conditions. Use perlite or well-draining potting soil to prevent waterlogging. Transplant seedlings once they develop 2-3 true leaves. Start seeds in individual pots to give seedlings adequate space during their first weeks. If initial hot water soaking fails, nick the seed coat and retry with warm water.
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