Queen of the Night Cactus (Cereus jamacaru)
Jamacaru
About this plant
Cereus jamacaru, also known as the Queen of the Night cactus, is a tall, columnar cactus native to Brazil. It has ribbed stems with sharp spines and produces large, fragrant white flowers that bloom at night. This cactus is popular as an ornamental plant and is admired for its dramatic nighttime blooms.
Taxonomy
Higher classification: Order Caryophyllales
Origin & Distribution
- Native region
- Brazil
- Distribution
- Native to northeastern Brazil; cultivated in warm regions worldwide.
Care
- Suitable locations
- Indoor, Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing, East-facing
- 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 sparingly, allowing the 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) once a month. Avoid fertilizing in winter when the plant is dormant.
Cereus jamacaru is a tough cactus that grows well in sunny spots and dry conditions. It needs minimal watering and is easy to care for, making it great for beginners. Overwatering can cause root rot, so let the soil dry out between waterings.
Propagation
- Propagation methods
- Seeds, Cuttings
Ornamental features
- Flowering
- Yes
- Flowering period
- spring–summer
Tall columnar shape, sharp spines, large fragrant white night-blooming flowers.
Toxicity & Safety
Non-toxic to humans and pets but spines can cause injury if touched.
Allergy information
Cereus jamacaru is not known to cause allergies for most people. However, its spines can cause skin irritation if touched. To avoid problems, handle the plant carefully and wear gloves when pruning or repotting.
Common problems
Overwatering can lead to root rot. Lack of sunlight may cause weak growth. Spines can cause injury if handled carelessly.
Uses
Primarily grown as an ornamental plant for its striking appearance and beautiful night flowers.
Notes
Be careful when handling due to sharp spines. Repot every 2–3 years to refresh soil and allow growth. Protect from frost as it is sensitive to cold temperatures.