Euphorbia milii, commonly known as ‘Crown of Thorns,’ is a popular succulent that is loved for its unique appearance and stunning flowers. In this comprehensive care guide, we will explore all aspects of growing and maintaining this beautiful plant. From its common names to its unique adaptations, from its care requirements to its propagation methods, we will cover everything you need to know to keep your Euphorbia milii thriving.
Dig in!
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Common Names
Euphorbia milii is commonly known as ‘Crown of Thorns,’ but it also goes by other names such as Christ Plant, Christ Thorn, and Christ Crown.
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Plant Description and Size
Euphorbia milii features thick, thorny stems and oval-shaped, glossy green leaves. The plant can grow up to 3 feet (90 cm) tall, with a spread of 2 feet (60 cm). The stems are densely covered with sharp, inch-long thorns, which give the plant its distinctive appearance.
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Flower Color and Blooming Period
The flowers of Euphorbia milii come in a variety of colors, including red, pink, yellow, and white. The blooming period typically occurs during the spring and summer months, although some varieties may produce flowers year-round under the right conditions.
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Euphorbia milii ‘Crown of Thorns’ Care Requirements
Euphorbia milii ‘Crown of Thorns’ is a relatively low-maintenance succulent, but it still requires specific care to thrive. Here are the key factors to consider when caring for your ‘Crown of Thorns’:
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Light Requirements
Euphorbia milii ‘Crown of Thorns’ prefers bright, indirect light. It can tolerate some direct sunlight, but too much can scorch the leaves. Place your plant near a south or west-facing window where it can receive adequate sunlight throughout the day.
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Watering
Euphorbia milii ‘Crown of Thorns’ is a succulent that stores water in its thick stems and leaves, making it drought-tolerant. Water your succulent thoroughly when the top inch of soil feels dry. Be careful not to overwater, as this can lead to root rot. Allow the soil to dry out between waterings.
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Soil
A well-draining soil mix is crucial for the health of your Euphorbia milii ‘Crown of Thorns’. Use a cactus or succulent-specific potting mix, or create your own by combining regular potting soil with perlite or sand to improve drainage. Avoid heavy, water-retentive soils, as they can cause root rot.
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Temperature Tolerance
Euphorbia milii ‘Crown of Thorns’ prefers temperatures between 65°F to 85°F (18°C to 29°C). It can tolerate brief dips in temperature down to 50°F (10°C), but prolonged exposure to cold temperatures can damage the plant. Protect it from frost and keep it away from drafts or cold windows during the winter months.
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USDA Hardiness Zone
Euphorbia milii ‘Crown of Thorns’ is best suited for USDA hardiness zones 9 to 11. In colder climates, it is often grown as a houseplant or brought indoors during the winter.
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Fertilizing
Feed your Euphorbia milii ‘Crown of Thorns’ with a balanced, water-soluble fertilizer diluted to half the recommended strength. Apply the fertilizer every two to four weeks during the growing season (spring and summer). Reduce or stop fertilizing in the fall and winter when the plant goes into dormancy.
Succulent Fertilizer available to purchase on Etsy.
Repotting
Euphorbia milii ‘Crown of Thorns’ generally doesn’t require frequent repotting. Repot your plant every two to three years or when it becomes root-bound or the soil is extremely compacted. Choose a slightly larger pot with drainage holes and use fresh potting soil. Be cautious when handling the plant due to its thorns.
When you’re rooting or transplanting your succulents and cacti, use SUPERthrive to help reduce the chance of transplant shock and grow a strong root system.
Euphorbia milii ‘Crown of Thorns’ Propagation
The easiest way to propagate Euphorbia milii ‘Crown of Thorns’ is through stem cuttings. Take a 4 to 6-inch (10 to 15 cm) cutting from a healthy stem and allow it to dry for a few days. Then, plant the cutting in a well-draining soil mix and keep it slightly moist until roots develop. Propagation can also be done using seeds or by grafting.
Pests and Pest Control
Euphorbia milii ‘Crown of Thorns’ are relatively resistant to pests, but they can occasionally attract mealybugs and spider mites. To control these pests, wipe the leaves with a damp cloth or cotton swab dipped in rubbing alcohol. In severe infestations, use insecticidal soap or neem oil, following the instructions on the product label.
Common Problems and Solutions
One common problem with Euphorbia milii ‘Crown of Thorns’ is yellowing leaves, which can be caused by overwatering or insufficient light. Adjust the watering frequency and move the plant to a brighter location to address these issues. Another problem is root rot, which occurs when the plant is kept in waterlogged soil. Ensure that the soil has good drainage and avoid overwatering.
Growing Euphorbia milii ‘Crown of Thorns’ Indoors
Euphorbia milii ‘Crown of Thorns’ can be grown indoors successfully with the right conditions. When growing indoors, place your Crown of Thorns plant near a sunny window where it can receive at least 4 to 6 hours of sunlight each day. If natural light is limited, you can supplement it with artificial grow lights. Maintain a temperature range of 65°F to 85°F (18°C to 29°C) and provide good air circulation to prevent fungal diseases.
Toxicity and Handling
It’s important to note that Euphorbia milii ‘Crown of Thorns’ is toxic and can cause skin irritation or allergic reactions in some individuals. When handling the plant, wear gloves and avoid contact with the milky sap that oozes from the stems when cut or broken. Keep the plant out of reach of children and pets.
Euphorbia milii ‘Crown of Thorns’ is a captivating succulent that can add a touch of beauty to any indoor or outdoor space. By following the care guidelines outlined in this comprehensive guide, you can ensure that your CEuphorbia milii ‘Crown of Thorns’ thrives and continues to delight you with its unique thorny stems and colorful flowers. Enjoy the process of growing and caring for this remarkable succulent!
