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PlantSnap
Plant Care
Crown of thorns
(Euphorbia milii)
Also Known As
Crown of thorns, Christ thorn, Euphorbia milii var. splendens
About This Plant
Euphorbia milii is a species of flowering plant in the spurge family. It is a succulent shrub that grows up to 1.8 meters (6 feet) tall with thick, fleshy stems and leaves. The flowers are small and clustered, with red, pink, or yellow bracts that resemble petals.
Plant Care Instructions
Outdoor Size Range
3-6 feet (0.9-1.8 meters)
Light Requirements
Euphorbia milii prefers bright, indirect light, but can tolerate some direct sunlight. It should be placed in a south or west-facing window if grown indoors.
Humidity Needs
Euphorbia milii prefers low to moderate humidity levels.
Fertilizing Schedule
Fertilize with a balanced fertilizer every 4-6 weeks during the growing season. Do not fertilize during the winter months.
Pruning Guidelines
Prune Euphorbia milii in the spring to shape the plant and remove any dead or damaged growth.
Common Pests and Diseases
Common pests for Euphorbia milii include spider mites, mealybugs, and scale insects.
Indoor Size Range
12-36 inches (30-91 cm)
Watering Schedule
Watering should be done sparingly, allowing the soil to dry out between waterings. Overwatering can lead to root rot.
Temperature Range
This plant prefers warm temperatures between 60-85°F (15-29°C) and can tolerate temperatures as low as 50°F (10°C).
Growing Season
Euphorbia milii can be grown year-round indoors, but is best grown outdoors during the spring and summer months.
Growing Difficulty Level
Euphorbia milii is relatively easy to grow, but can be sensitive to overwatering and cold temperatures.
USDA Hardiness Zones
Euphorbia milii is not frost-tolerant and is best grown in USDA hardiness zones 9-11.
Did You Know?
The sap of Euphorbia milii is toxic and can cause skin irritation and eye damage. It has been used in traditional medicine to treat a variety of ailments, including warts and snake bites.
