How Often to Water a Crown of Thorns
Euphorbia milii · Difficulty: Easy
Care Snapshot
| Light | Bright light with several hours of direct sun |
|---|---|
| Soil | Well-draining succulent or cactus mix |
| Humidity | Low to average humidity is fine (below 40%) |
| Temperature | 18-27°C (65-80°F) |
| Pet Safety | ☠️ Toxic to cats & dogs (milky sap is irritating to skin, mouth and eyes) |
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Signs of Overwatering
Yellowing leaves that drop along with soft, dark patches on the thorny stems mean the roots have been sitting too wet.
Signs of Underwatering
The small oval leaves drop first (a survival response), leaving bare thorny stems, though flowering can continue even under mild drought stress.
Adjusting for the Seasons
Can bloom almost year-round in bright light with minimal winter dormancy, unlike many flowering succulents - just water less as light drops.
Pro Tip
Wear gloves when handling or repotting - the milky white sap is a skin and eye irritant, not just the thorns, so keep it out of reach of curious pets and children.
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