Siamese cassia (Senna siamea)
Care, watering, light and tips for Siamese cassia on Floravia.
Quick facts
- Family: Fabaceae
- Difficulty: Moderate care
- Watering: every 7 days
- Light: Full sun
- Temperature: 5–35 °C
- Toxicity: Toxic to pets
About Siamese cassia
Senna siamea, also known as Siamese Senna or Cassia siamea, is a fast-growing, medium to large tree with dense foliage and bright yellow flowers that appear in clusters. It is an excellent choice for providing shade in tropical and subtropical gardens, or as an ornamental tree in avenues and parks due to its attractive appearance and showy blooms.
Native range
Southeast Asia (Thailand, Malaysia, Indonesia)
Care tips
It thrives in full sun for optimal flowering and vigorous growth. It requires regular watering during establishment and dry periods, but is relatively drought-tolerant once mature. It adapts to a wide range of well-drained soils, from sandy to clayey. Avoid excessively heavy or waterlogged soils, as they can lead to root rot.
How to save a dying Siamese cassia
- Warning signs
- Yellow or brown leaves falling rapidly, stunted growth, or general wilting. 🌿
- First aid
- Check soil drainage and moisture. Ensure it gets enough direct sunlight. Prune dry branches.
- What kills it
- Overwatering causing root rot or prolonged lack of direct sunlight. It cannot tolerate frost.
- Can it be saved?
- Yes, if you act quickly and correct conditions. It's a resilient species if its basic needs are met.