Semal (Silk Cotton Tree) — also known as Red Silk-Cotton Tree — is a deciduous / flowering / forestry tree from the Malvaceae family, native to Tropical & Subtropical Asia, including the Indian Subcontinent. Raised from these Bombax ceiba seeds, it grows into a deciduous tree reaching about 20–30 m with a broad, open / spreading canopy and a spread of about 10–15 m. These are natural, untreated seeds of a large deciduous flowering tree suitable for forestry, landscape and ornamental planting. Its blooms in shades of bright red to scarlet-red flowers make it a standout garden tree wherever it is planted.
Each pack contains 10 g of seeds with a germination rate of about 60–80% under suitable conditions, and seedlings typically emerge in about 1–3 weeks (7–21 days). Rated easy to moderate to raise from seed, Semal (Silk Cotton Tree) responds best when you use fresh seeds; soaking seeds in water before sowing may help encourage uniform germination. Start seeds in nursery trays or Geo Fabric Circular Grow Bags filled with a light, well-draining mix, then shift healthy seedlings to a spot with full sun and well-drained loamy, sandy-loam or alluvial soil (pH 5.5–7.5). A Small Stainless Steel Trowel makes lifting and transplanting young seedlings easy without disturbing the roots.
The ideal sowing window in India is February–July, during the spring to monsoon window, when warm 20–35°C temperatures support quick, even germination. Semal (Silk Cotton Tree) suits urban planting, avenue and roadside planting, landscaping, agroforestry and farm and boundary planting across tropical & subtropical zones. Traditional/Ayurvedic uses are reported; seeds sold for planting purposes. Timber value is rated moderate. Planning a mixed landscape? Pair it with our Spathodea Campanulata (African Tulip Tree Seeds) for a varied, resilient planting.
Beyond its practical value, Semal (Silk Cotton Tree) provides tree cover, shade, floral resources and wildlife habitat, has carbon sequestration potential rated moderate to high, and high; flowers provide food resources for various animals. Growing from seed is the most economical way to establish your own nursery stock, and it lets the young tree adapt to your local soil and climate from day one — ideal for home gardeners, farm owners, schools, CSR plantation drives and landscape projects.
How to Grow Semal (Silk Cotton Tree) from Seed
Semal (Silk Cotton Tree) Sowing Season in India
Sow in the spring to monsoon window, ideally February–July, at 20–35°C. Avoid cold winter sowing, when germination slows sharply. Suits tropical & subtropical climates up to 1,500 m.
Seed Preparation
Use fresh seeds; soaking seeds in water before sowing may help encourage uniform germination. Discard shrivelled or hollow seeds. Regional guidance: ICFRE.
Sowing Semal (Silk Cotton Tree) Seeds
- Method: Nursery / Seed Tray / Polybag Sowing; direct sowing: possible; nursery sowing preferred
- Mix: garden soil, cocopeat and compost, well-drained
- Depth: cover with a thin layer, about twice the seed's thickness
- Germination: about 1–3 weeks (7–21 days)
- Keep warm and evenly moist; mist with a 1 L Spray Pump
Transplanting and Spacing
Transplant established seedlings carefully into a sunny location with adequate space for future tree development. Spacing: about 6–10 m (mature spread about 10–15 m). Containers: suitable only during seedling/young stage.
Ongoing Care
Give full sun and moderate; regular watering during establishment water using a Watering Can. Tolerance: drought moderate once established, frost low to moderate and waterlogging low; shield seedlings from frost and standing water in year one. Growth rate is moderate to fast; feed with compost or bio-fertilisers each monsoon.
Where to Plant Semal (Silk Cotton Tree)
Best for urban planting, avenue and roadside planting, landscaping, agroforestry and farm and boundary planting. Zones: tropical & subtropical zones. States: Madhya Pradesh, Maharashtra, Rajasthan, Gujarat, Uttar Pradesh, Bihar and other warm regions.
Common Problems
Excess watering, poor drainage, insufficient sunlight and transplant stress. Good drainage and avoiding overwatering prevent most seedling losses.
Common Name: Semal / Silk Cotton Tree / Red Silk-Cotton Tree
Botanical Name: Bombax ceiba L.
Plant Family: Malvaceae
Genus: Bombax
Tree Type: Deciduous / Flowering / Forestry Tree
Growth Form: Tree
Evergreen / Deciduous: Deciduous
Native Region: Tropical & Subtropical Asia, including the Indian Subcontinent
Native / Introduced: Native
Seed Type: Flowering / Forestry Tree Seeds
Pack Size: 10 g
Germination Rate: Approx. 60–80% under suitable conditions
Germination Time: Approx. 1–3 Weeks
Planting Season: Spring to Monsoon / Warm Season
Best Sowing Months (India): February–July
Expected Mature Height: Approx. 20–30 m
Expected Mature Spread: Approx. 10–15 m
Canopy Type: Broad, Open / Spreading Canopy
Root Type: Strong Woody Tree Root System
Tree Growth Rate: Moderate to Fast
Timber Value: Moderate
Fruit / Seed Use: Seeds primarily for propagation; other traditional uses reported
Seed Shelf Life: Approx. 6–12 Months under suitable storage
Country of Origin: India
Sunlight: Full Sun
Water Requirement: Moderate; regular watering during establishment
Soil Type: Well-drained loamy, sandy-loam or alluvial soil
Soil pH: Approx. 5.5–7.5
Temperature Range: Approx. 20–35°C
Suitable Climate: Tropical & Subtropical
Rainfall Requirement: Moderate
Altitude Range: Approx. 0–1,500 m
Drought Tolerance: Moderate once established
Frost Tolerance: Low to Moderate
Wind Tolerance: Moderate
Shade Tolerance: Low
Waterlogging Tolerance: Low
Plant Spacing: Approx. 6–10 m
Nursery Suitable: Yes
Direct Sowing: Possible; nursery sowing preferred
Container Suitable: Suitable only during seedling/young stage
Bonsai Suitable: Possible, but not a primary use
Urban Planting: Yes, where adequate space is available
Roadside Planting: Yes, with sufficient planting space
Landscaping: Yes
Agroforestry: Yes / Potentially Suitable
Pollinator Friendly: Yes
Bird Friendly: Yes
Carbon Sequestration: Moderate to High
Erosion Control: Moderate
Growing Difficulty: Easy to Moderate
Seed Storage: Store clean, dry seeds in a cool, dry and moisture-free place
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