Siamese Senna
Senna siameafam. Fabaceae
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Pl. 060F — Senna siamea
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IOverview
Overview
Siamese Senna, scientifically known as Senna siamea, is a large tree native to Laos, Myanmar, Sri Lanka, Thailand, and Vietnam. This plant thrives in full sun to partial shade and prefers moist soil that can be light (sandy), medium, or heavy (clay). It is hardy in zones 9-12 and can grow up to 12 meters tall. Siamese Senna is known for its edible parts, including flowers, fruit, and leaves, making it a valuable resource in some regions. Its distinctive feature is the ability to adapt to various soil types while maintaining its ornamental value due to its size and growth habit.
Quick answers
What is Siamese Senna?
Siamese Senna, scientifically known as Senna siamea, is a large tree native to Laos, Myanmar, Sri Lanka, Thailand, and Vietnam. This plant thrives in full sun to partial shade and prefers moist soil that can be light (sandy), medium, or heavy (clay).
Compare with:African Oil Bean Oil Bean Tree→African Walnut→Allanblackia parviflora→all comparisons →
Growingconditions · propagation · uses
VCultivation
Cultivation
Siamese Senna thrives in full to partial sun and requires moist soil that can be light (sandy), medium, or heavy (clay). It is hardy in zones 9-12 and can grow up to 12 meters tall as a tree. For propagation, use seeds or cuttings. The plant's edible parts include flowers, fruit, and leaves.
Light
Full sun, Partial sun/shade
Water
Moist
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
9-12
Habit
Tree
Mature size
12.0 m tall
For first-time growers
How to grow Siamese Senna for the first time
8steps
Start with Siamese Senna as a simple, low-maintenance tree for your garden.
- 1
What you'll need
A young Siamese Senna sapling and some basic gardening tools like a trowel.
- 2
Best time to plant
Plant in spring when the last frost has passed, or in fall before the first freeze.
- 3
Soil and container prep
Ensure soil is well-draining. For containers, use a mix of light (sandy), medium, and heavy (clay) soils.
- 4
Sowing or transplanting
Transplant the sapling into a sunny spot in your garden or a large container with moist soil.
- 5
First two weeks
Water regularly to keep the soil consistently moist. Monitor for any signs of stress.
- 6
Ongoing care
Provide full sun and water when the soil feels dry. Prune lightly in late winter or early spring.
- 7
Harvest or pruning
Prune to maintain shape and remove dead branches as needed. Flowers can be harvested for decorative purposes.
- 8
Common mistakes
Overwatering, planting in heavy shade, neglecting regular pruning, using the wrong soil type, and not providing enough sunlight.
VIEdible & utility
Edible & utility
Edible parts:FlowersFruitLeaves
Edible uses: Siamese Senna flowers, leaves, and fruits are edible. The leaves can be eaten fresh or cooked in various dishes. The flowers and pods are often used raw in salads or prepared as a potherb. The seeds from the fruit can also be consumed after proper preparation.
Other uses:BiomassFire starterFencingAnimal feedLumberHedgerowMulchPest controlWind breakerSoil conditionerSoil reclamationErosion controlTanninNitrogen fixer
Contextrange · companions · related
VIIDistribution
5 native · 25 introduced
Distribution
5 native · 25 introducedDistribution across4 continents· 5 native· 25 introduced
Asia8 regions
native (5)LaosMyanmarSri LankaThailandVietnam
introduced (3)BangladeshCambodiaIndia
Americas2 regions
introduced (2)BahamasEl Salvador
Africa8 regions
introduced (8)AngolaBeninBurkina FasoBurundiCameroonChadComorosEthiopia
Oceania1 region
introduced (1)Fiji
Broader regions
introduced:Brazil Northeast, Borneo, Brazil North, Brazil South, Brazil West-Central, Brazil Southeast, Caroline Is., Central African Repu, Congo, East Himalaya, Andaman Is.
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Fabaceae), common use cases, and growing requirements.
same family · Fabaceae
Botanical relatives — often share phytochemistry + growing needs.
XI
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Companion planting
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Growing zone
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