Description
Oroxylum indicum is a species of flowering plant belonging to the monotypic genus Oroxylum and the family Bignoniaceae. It can reach a height of 18 metres (59 ft). Various segments of the tree are used in traditional medicine.
Germination Guide
🌍 Indian subcontinent, Himalayan foothills, Bhutan, southern China, Indochina, Malesia
Moderate
Oroxylum indicum is a fast-growing medicinal tree native to tropical Asia, used in Ayurvedic and Chinese medicine. Seeds exhibit dormancy requiring cold water pre-treatment for optimal germination. Commercially important for reforestation and traditional medicine production.
Germination
Germination time
Expect germination in
8 – 42 days
Temperature
Min 15°C
Ideal 17°C
Max 20°C
Substrate moisture
💧💧 High
Sowing depth
Lightly covered
Seed Pre-treatment
-
💧
Soaking — 24 hours
Cold water at 4°C for 24h optimal; warm water pre-soak also recommended
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❄️
Cold stratification — 1 days at 4°C
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📋
Additional notes
Cold water treatment superior to hot water and BAP/GA3 growth regulators; 80%+ germination with 24h cold water
Substrate & Container
Recommended substrate
well-drained sandy compost, fertile soil with organic matter
Recommended container
nursery seedbed or individual containers
Growing Tips
Keep seeds cold-stored for several months before sowing; in vitro conditions significantly enhance germination rates (100% under specific protocols); sow in lightly shaded position; maintain consistently moist substrate; seeds deteriorate quickly in storage at room temperature; winged seeds perform better than dewinged seeds
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