Stetson's cactus
Stetsonia coryne
Stetsonia coryne
About this plant
Stetsonia coryne is a large, columnar cactus native to South America. It can grow tall with thick, ribbed stems and sharp spines. It produces white flowers at night and is often grown as an ornamental plant in gardens and collections. Its impressive size and drought tolerance make it a striking addition to dry landscapes.
Taxonomy
- Genus
- Stetsonia
- Family
- Cactaceae
- Higher classification
- Order: Caryophyllales
- Plant type
- Cactus
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Argentina, Bolivia, Paraguay
- Distribution
- Native to Argentina, Bolivia, and Paraguay; cultivated in dry regions worldwide.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Greenhouse, Balcony, Indoor
- Preferred window facing
- South-facing, West-facing, East-facing
- Watering frequency
- Rare
- Watering interval
- 14–21 days
- Humidity
- Low
- Minimum
- 5 °C
- Maximum
- 40 °C
- Optimal
- 18-30 °C
- USDA hardiness zones
- 9-11
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining sandy or cactus potting mix
Watering. Water deeply but infrequently, allowing soil to dry completely between waterings. Reduce watering in winter when the plant is dormant.
Fertilizing. Feed with a balanced cactus fertilizer during the growing season (spring and summer) every 4-6 weeks. Avoid fertilizing in winter when the plant is dormant.
Stetsonia coryne is a hardy cactus that prefers bright sunlight and well-draining soil. It is drought-tolerant and needs watering only when the soil is completely dry. Overwatering can cause root rot, so careful watering is important. It grows slowly and requires minimal maintenance once established.
Propagation
- Propagation methods
- Seeds, Cuttings
- Care difficulty
- Medium
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Tall columnar form with thick ribs and sharp spines; large white night-blooming flowers.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Not considered a weed
Not known to be toxic, but spines can cause injury if touched carelessly.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Skin contact
- Pollen level
- Low
Stetsonia coryne is not known to cause allergies. However, people sensitive to cactus spines should handle it carefully to avoid skin irritation.
Common problems
Overwatering can lead to root rot. Insufficient light may cause weak growth. Pests like mealybugs can occasionally appear.
Uses
Primarily grown as an ornamental plant for gardens and collections due to its impressive size and striking appearance.
Notes
Handle with care due to sharp spines. Repot only when necessary, preferably in spring. Protect from frost as it is sensitive to freezing temperatures.