Crown of Thorns (Euphorbia milii)
Splendens
About this plant
Euphorbia milii, commonly known as Crown of Thorns, is a succulent shrub with thorny stems and small, colorful flowers that bloom year-round in warm conditions. It is popular as a houseplant and in gardens for its attractive flowers and resilience. The plant exudes a milky sap that can irritate skin and eyes. It is native to Madagascar and has been cultivated worldwide.
Taxonomy
Higher classification: Order Malpighiales
Origin & Distribution
- Native region
- Madagascar
- Distribution
- Widely cultivated as a houseplant and garden shrub in tropical and subtropical 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 potting mix, cactus or succulent soil
Watering. Water when the top inch of soil feels dry. Avoid overwatering; allow soil to dry between waterings to prevent root rot.
Fertilizing. Feed with a balanced, diluted fertilizer every 4-6 weeks during the growing season (spring and summer). Avoid fertilizing in winter when the plant is less active.
Euphorbia milii is a tough, drought-tolerant plant that thrives in bright sunlight. It prefers well-draining soil and should be watered moderately, allowing the soil to dry out between waterings. Overwatering can cause root rot, so it's best to avoid soggy soil. It requires minimal maintenance and is suitable for beginners.
Propagation
- Propagation methods
- Cuttings
Ornamental features
- Flowering
- Yes
- Flowering period
- spring–fall
Thorny stems with small, bright red or pink flowers and green leaves; attractive year-round blooms.
Toxicity & Safety
The sap is toxic if ingested and can cause skin irritation. Keep away from children and pets.
Allergy information
Euphorbia milii can cause skin irritation or allergic reactions in some people due to its milky sap. Avoid touching the sap and wash your hands if you come into contact with it. People sensitive to plant latex or with latex allergies should be cautious.
Common problems
Common problems include overwatering leading to root rot, leaf drop if kept too cold or in low light, and occasional pest issues like mealybugs or spider mites.
Uses
Used as an ornamental plant for indoor decoration and outdoor gardens in warm climates. Its colorful flowers and thorny stems add visual interest.
Notes
Wear gloves when pruning or handling to avoid skin irritation from the sap. Prune to shape and remove dead stems. Repot every 2-3 years or when root-bound.