Cassia javanica grows into a broad, graceful tree covered with clusters of pink and white flowers. New blooms may open in deeper rose shades and gradually become pale pink or nearly white, giving the canopy several colours at the same time.
Native to Southeast Asia, it is grown for its seasonal flower display and spreading shade. The branches carry divided green leaves, followed by long, dark seed pods after flowering. This large tree is best suited to lawns, entrances and other spacious parts of the home garden.
Why Gardeners Love It
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Colourful Canopy: Mature trees produce masses of pink and white flowers.
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Changing Shades: Blooms gradually fade, creating several pink shades together.
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Natural Shade: The broad crown provides useful shade as the tree matures.
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Pollinator Friendly: Flowers attract bees, butterflies and other visiting insects.
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Long-Term Beauty: Becomes an impressive garden feature that can live for many years.
Best Conditions
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Germination: Usually 14–30 days after seed treatment
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Germination temperature: Around 22–30°C
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Sunlight: At least 6–8 hours
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Starting pot: An 8–10-inch pot
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Final position: Open ground
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Spacing: About 25–30 feet between large trees
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Mature height: Usually around 35–45 feet
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Soil: Fertile and well-draining soil
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First flowers: Often around 3–6 years from seed
In Lahore, Faisalabad, Islamabad and Rawalpindi, sow from February to April after the coldest weather has passed. In Karachi and southern Punjab, sow from February to March, or again from August to September after extreme heat and heavy rain have eased. In colder northern and hilly areas, sow from April to May and protect the young tree from severe frost.
How to Sow
- Rub one spot on the hard seed coat gently with a nail file until it becomes slightly thinner.
- Soak the treated seeds in warm water for 12–24 hours.
- Sow one seed around ½ inch deep in a small pot filled with moist seed starter mix.
- Keep the pot warm and maintain light moisture without making the mix soggy.
- Transplant the seedling carefully when it is around 6–10 inches tall.
Plant Care
Water regularly during the first year to help the roots establish. Water deeply and then allow the upper soil to begin drying before watering again. Once established, the tree can handle short dry periods, but prolonged dryness may slow its growth.
Mix Vermicompost into the soil before planting. Apply a balanced fertilizer lightly during active spring growth while the tree is young. Excessive feeding can produce soft branches and delay flowering.
Shape the tree during its early years by removing weak, crossing or badly positioned branches. Check young shoots for aphids, scale insects and leaf-eating caterpillars. Remove caterpillars by hand and use Neem Oil if sucking pests appear.
Local Gardener Tips
- Choose the final planting position before the seedling becomes large.
- Leave generous distance from walls, drains and overhead wires.
- Keep the base free from standing rainwater.
- Protect young plants from frost and strong wind.
- Remove unwanted seed pods before they open and scatter seeds.
Flowering
A mature Cassia javanica usually flowers during warm weather. The blooms develop in clusters near the ends of the branches, beginning in stronger pink shades and becoming paler as they age.
Full sunlight encourages a heavier display. Flowering may be limited on young trees, plants growing in shade or trees receiving excessive nitrogen fertilizer. Seed-grown trees can differ slightly in flower colour, flowering time and growth habit.
FAQs
Why did the seeds remain hard after soaking?
The outer coat may not have been filed enough for water to enter. Remove the seed, rub one small area again with a nail file and soak it in fresh warm water. Stop filing as soon as the lighter inner layer becomes visible.
Why is my seedling growing tall and weak?
Weak sunlight, crowded conditions and excessive fertilizer can produce thin growth. Move the seedling gradually into stronger light and avoid feeding until it develops a firmer stem.
Will every tree have exactly the same flower colour?
No. Seed-grown trees naturally vary. Flowers generally appear in pink and white shades, but their exact colour, markings and intensity may differ from one tree to another.
Why is the tree losing some of its leaves?
Cassia javanica can lose part of its foliage during cool, dry or stressful weather. Check that the soil is draining correctly and continue normal care. Healthy trees usually produce new leaves when warm growth begins.
Can it remain permanently in a pot?
No. A pot is suitable only while the tree is young. Cassia javanica develops into a large shade tree and should eventually be planted in open ground with enough room for its canopy and roots.
Common names: Cassia javanica, Java Cassia, Pink Shower Tree, Pink and White Shower Tree, Apple Blossom Tree
