Argentine Senna
Cassia corymbosa
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Shrub
Height
96 inches
Width
96 inches
Light
Full Sun
Zones
8, 9
Water
Low to moderate
Humidity
Average
Lifespan
Perennial
Native To
South America
Toxicity
Parts are toxic if ingested
The Story
Plant Bio
Senna corymbosa (syn. Cassia corymbosa) is a fast-growing, evergreen to semi-evergreen shrub or small tree with pinnate leaves and large clusters of bright, buttercup-yellow flowers from late summer into fall. This species is valued for its drought tolerance and adaptability to poor soils, making it an excellent choice for xeriscaping and low-maintenance gardens.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-drained soil in spring
- Water regularly until established, about 6 weeks
- Place in full sun for optimal flowering
- Prune lightly after flowering to maintain shape
- Mulch around base to retain moisture
- Fertilize with balanced fertilizer in spring
Pro Tip
Ensure excellent drainage to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Prune to shape after flowering
- Apply mulch to conserve moisture
Don't
- Overwater, avoid soggy soil ❌
- Heavy fertilization during dormancy ❌
- Ignore pruning after flowering ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Argentine Senna questions
What zones can Argentine Senna grow in?
Argentine Senna is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Argentine Senna deer resistant?
Not reliably. Deer may browse Argentine Senna, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Argentine Senna bloom?
Argentine Senna typically blooms in late summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Argentine Senna need full sun?
Argentine Senna does best in full sun (6+ hours).
Is Argentine Senna drought tolerant?
Yes — once established (usually after the first full season), Argentine Senna handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Argentine Senna with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
