Decary's Spurge (Euphorbia decaryi)

Decary's Spurge

Euphorbia decaryi

Its compact rosettes hold geometric symmetry, a desert gem with subtle charm. Succulent perennial; common name: Decary's Spurge.

Full sun
0.5–1/week
Moderate
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Plant Needs

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Sunlight Bright direct sunlight for 6–8 hours daily; tolerates partial shade but loses vibrant red leaf margins
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Watering Water deeply only when the soil is completely dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Thrives at 15–25°C; protect from temperatures below 10°C to avoid frost damage
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Characteristics

  • Leaf: Thick, fleshy triangular to ovate leaves arranged in tight rosettes; green to bluish-green with red margins in bright sunlight
  • Flower: Tiny, inconspicuous cyathia surrounded by pale yellow bracts, clustered at rosette centers
  • Stem: Short, woody stems that slowly branch to form dense clumps
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Care Guide

Watering

Water when soil is fully dry; allow excess water to drain completely from the pot

Fertilization

Diluted cactus fertilizer applied once monthly. Use a balanced, low-nitrogen fertilizer diluted to half strength

Eggshell powder topdressing:Grind dried, rinsed eggshells into fine powder; sprinkle lightly on the soil surface, avoiding direct contact with rosette leaves to prevent burning
Pruning
  • Remove dead or withered leaves from rosette bases to improve airflow and reduce pest risk
  • Trim leggy stems in early spring to encourage compact, clumping growth
  • Snip off spent flower stalks after blooming to redirect energy to new rosette development
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed toxic; sap contains diterpene esters that cause oral irritation, vomiting, and diarrhea

Humans: Milky sap causes mild dermal irritation; ingestion leads to oral pain and nausea

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental succulent for container gardens, rock gardens, and succulent arrangements