Euphorbia 'Sonoma' (Crown of Thorns): Indoor vs. Outdoor Care

Understanding Your Plant

Euphorbia 'Sonoma' is a cultivar of Euphorbia milii (Crown of Thorns), a succulent shrub native to Madagascar. It's grown for colorful bracts (modified leaves) that resemble flowers.

Light Requirements: The Acclimation Factor

Nurseries often grow these in shade for indoor sales. Your plant is leggy and dropping lower leaves—signs it was grown in lower light. Do not place it directly in intense Texas sun. It will sunburn.

Recommended Transition

1. Keep indoors in a very sunny window (south/west) for now.
2. After 1 month: Move to light shade outdoors (covered patio).
3. After another month: Gradually introduce to direct sun if desired.
4. Alternatively: Keep it indoors permanently if it thrives there.

Care Tips

• Water: Let top inch of soil dry between waterings. Succulent—tolerates drought better than soggy soil.
• Soil: Well-draining cactus/succulent mix.
• Fertilizer: Light feeding in growing season (spring–summer).
• Caution: Sap is irritating/toxic. Wear gloves when handling.

Lower leaf yellowing is normal during acclimation or as the plant ages. Focus on healthy new growth at the tips.