Senna siamea Seeds | (syn. Cassia )
LATIN NAME: Senna siamea (syn. Cassia siamea)
COMMON NAME: Kassod Tree, Popcorn Tree
Plant Profile
Kassod Tree (Senna siamea, syn. Cassia siamea) is a fast-growing evergreen tree of the pea family (Fabaceae), native to Southeast Asia. It reaches 15-20 m, with feathery pinnate leaves and dense clusters of bright yellow flowers followed by long flat pods. Widely planted for shade, fuelwood and windbreaks in the tropics, its young leaves and flowers are also eaten as a vegetable in Thailand and neighbouring countries.
Science & Biotechnology
Botanists studying the Senna group regularly include Senna siamea (syn. Cassia siamea) in comparative work, and the species also appears in horticultural trials aimed at gardeners and growers. This documented risk makes proper traditional preparation, including thorough cooking and moderate portion sizes, genuinely important for anyone consuming leaves as food. Nothing exotic is required: standard seed-sowing practice, done carefully, is enough.
Uses & Benefits
Beyond its ornamental appeal, Kassod Tree has the practical versatility that makes a plant worth growing from seed year after year. Given documented cases of liver toxicity associated with excessive consumption, anyone eating leaves should follow established traditional preparation methods and moderate portions rather than treating it as an everyday leafy green. After the first season it asks for very little beyond a place that suits it.
Senna is the world’s standard herbal laxative, its sennosides official in every pharmacopoeia for short-term constipation; it is effective, well-studied and meant for occasional use only.
Growing from Seed
Starting Kassod Tree from seed is simple and satisfying. Nick or lightly sand hard seed coat and soak it in warm water overnight before sowing into a loose, free-draining tropical mix. Bright light suits young tree well, and it typically establishes quickly, growing into a substantial shade tree within a relatively short number of years. Use a fine, free-draining seed compost, scatter the seed evenly, cover it lightly and hold it just moist in good light. Prick the seedlings out once they are large enough to handle, grow them on in bright light, and plant out when conditions allow.
Our Take
Kassod Tree, Popcorn Tree has real presence in the garden without demanding much in return. Once the young plants are away, there is little left to do but watch them grow.
Related Reading
Gardeners who grow Kassod Tree often pair it with these related subjects: