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The Walking Crow's Guide to Plants and Gardening

The Crown of Thorns, also known as Christ Plant or Christ Thorn, is a striking succulent shrub renowned for its vibrant, long-lasting bracts (often mistaken for flowers) and its thorny stems. Despite its prickly appearance, it’s a popular choice for both indoor and outdoor gardens due to its resilience, ease of care, and symbolic significance.

  • Genus: Euphorbia
  • Species: Euphorbia milii
  • Growing Zone: Thrives in USDA Hardiness Zones 9-11. In colder regions, it can be grown as a houseplant or brought indoors during winter.
  • Origin: Native to Madagascar.
  • Toxicity: The Crown of Thorns plant is toxic if ingested or if the milky sap comes into contact with the skin or eyes. It contains a latex sap that can cause irritation, allergic reactions, and even more severe symptoms if consumed. Handle with care and wear gloves when pruning or propagating.
  • Health Benefits: While there’s no direct evidence of specific health benefits, like many succulents, it may contribute slightly to improved air quality by absorbing carbon dioxide during photosynthesis.
  • Soil: Prefers well-draining soil, such as a cactus or succulent mix.
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  • Sunlight: Thrives in full sun to partial shade. Requires at least 6 hours of direct sunlight per day for optimal flowering.
  • Water: Drought-tolerant and prefers infrequent watering. Allow the soil to dry out completely between waterings. Overwatering can lead to root rot.
  • Temperature: Prefers warm temperatures between 65-80°F (18-27°C). Can tolerate some heat and drought.
  • Humidity: Adaptable to average indoor humidity levels.
  • Fertilizer: Light feeder. Fertilize occasionally during the growing season (spring and summer) with a diluted, balanced liquid fertilizer or a specialized succulent fertilizer.
  • Pruning: Prune to shape or control size. Wear gloves and eye protection when pruning due to the toxic sap.
  • Propagation: Can be propagated from cuttings. Allow the cuttings to dry and callus over before planting in well-draining soil.
  • The Crown of Thorns plant is a slow-growing succulent that can eventually reach several feet tall and wide.
  • Its stems are covered in sharp thorns, hence its common name.
  • It produces colorful bracts in various shades of red, pink, yellow, and orange, which surround the actual tiny flowers.
  • The plant is relatively pest and disease resistant.

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