Senna (Senna corymbosa)
Pendula
About this plant
Senna corymbosa is a fast-growing shrub known for its bright yellow flowers that bloom in clusters. It has slender, green leaves and a graceful, somewhat weeping form. This plant is often grown for its ornamental flowers and ability to attract pollinators like bees and butterflies. It is also valued for its drought tolerance and ease of care in warm climates.
Taxonomy
Higher classification: Fabales
Origin & Distribution
- Native region
- Argentina, Uruguay
- Distribution
- Native to South America, especially Argentina and Uruguay; widely cultivated in warm regions worldwide.
Care
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing
- USDA hardiness zones
- 9-11
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining loam or sandy soil
Watering. Water regularly during the growing season but allow the soil to dry out between waterings. Reduce watering in winter.
Fertilizing. Feed with a balanced, slow-release fertilizer in early spring and again in mid-summer to support healthy growth and flowering.
Senna corymbosa is a hardy shrub that grows well in sunny spots and tolerates dry conditions once established. It needs well-draining soil and occasional watering during dry spells. Watch for overwatering, which can cause root problems. Pruning after flowering helps maintain shape and encourages new growth.
Propagation
- Propagation methods
- Seeds, Cuttings
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Bright yellow clustered flowers, slender green leaves, graceful weeping form.
Toxicity & Safety
Sap may cause skin irritation; keep away from children and pets to avoid ingestion.
Allergy information
Senna corymbosa may cause allergic reactions in some people, especially those sensitive to pollen or plant sap. The main triggers are its pollen and sap, which can cause skin irritation or respiratory symptoms like sneezing. To reduce exposure, avoid touching the sap and keep the plant in a well-ventilated area during flowering.
Common problems
Overwatering can lead to root rot. Inadequate sunlight may cause poor flowering. Occasionally, pests like aphids or scale insects may appear.
Uses
Primarily grown as an ornamental shrub for its attractive yellow flowers and drought tolerance. It can be used in gardens, balconies, or greenhouses in warm climates.
Notes
Prune after flowering to maintain shape and encourage bushier growth. Repot young plants annually until established. Protect from frost as it is sensitive to cold temperatures.