Crown of Thorns (Euphorbia milii)
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Binomial name
Euphorbia milii
Common names
Crown of Thorns, Christ Thorn, Poi Sian
Description
Crown of Thorns is a tough, spiny shrub that’s perfect for adding a unique touch to your garden or indoor space. With its small, colorful bracts in shades of red, pink, yellow, or orange, it blooms year-round in warm climates. Despite its thorny appearance, this plant is low-maintenance and drought-tolerant, making it ideal for those looking for an attractive, resilient addition to their landscape. The thick, succulent stems store water, allowing it to handle dry spells.
Light requirements
This plant thrives in full sun, where it can soak up plenty of light to promote continuous blooming. The more sunlight it gets, the more vibrant the flowers and bracts will be. While it can tolerate some partial shade, it blooms less frequently and grows more leggy in lower light.
Soil preferences, including pH and drainage
Crown of Thorns prefers well-draining soil with a slightly acidic to neutral pH (6.0–7.0). It does well in sandy or loamy soils that drain quickly, preventing the roots from sitting in water. It's important to ensure good drainage to avoid root rot, especially if grown in containers.
Water needs
This plant is very drought-tolerant once established, but it will thrive with occasional watering. Allow the soil to dry out completely between waterings, and be sure to water deeply. During the cooler months, reduce watering significantly, as it goes dormant. Be cautious not to overwater, as this can lead to root rot.
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