About
Senna siamea, the Siamese senna, is a fast-growing, evergreen tree to 15 m producing spreading pinnate leaves and large panicles of bright-yellow flowers in summer. A spectacular and rewarding tree for a warm, frost-free, sheltered garden.
About the genus
Senna are trees, shrubs and perennials producing alternate, pinnate leaves and racemes or panicles of five-petalled, usually bright-yellow flowers, followed by seed pods. Rewarding plants for warm, frost-free gardens and large conservatories.
Plant details
Suggested usesBedding, containers, hanging baskets.
Care notes
CultivationPlant after last frost in fertile soil.
PruningDeadhead regularly.
PropagationGrow from seed in spring.
Pest resistanceGenerally pest-free.
Disease resistanceGenerally disease-resistant.