Tropicals

Euphorbia milii

Crown of thorns

Euphorbia milii (generic species representative; cultivar not asserted). Available sizes and selections vary.

Prickly branching stems carry bright green leaves and long-lasting colored bracts around tiny flowers. A sunny indoor spot encourages its display. Flower color and mature size vary, and the dwarf selection remains a separate product.

At a glance

Water: Dry to moderate moisture; excellent drainage
Hardiness: USDA zones 9–11 outdoors
Bloom: Long-lasting colored bracts; flowering varies with conditions.
Light: Sunny window; sun with midday shade in summer heat

Sizes & prices

3"$12.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Drought: Tolerates dry periods.
Wet soil: Avoid wet, cold roots.

Safety & handling: Sharp spines and irritating milky sap. Wear gloves; protect eyes and keep away from children and pets.

Cats & dogs: Toxic if eaten. Keep out of reach.

If a pet eats a potentially toxic plant, contact your veterinarian promptly.

Growing & care

Soil: Well-drained soil-based potting mix.
Winter: Keep indoors away from frost and cold, wet conditions.
Maintenance: Seasonal leaf drop may precede a rest period.
Pests: Watch for scale, mealybugs and mites.
Size indoors: Usually under 2 ft. as a houseplant; larger shrubs develop in warm-climate outdoor conditions.

Sources & photo credits

NC State Extension

Photo: Cindy Christian · CC BY 4.0

Image notes: Euphorbia milii (generic species representative; cultivar not asserted). Available sizes and selections vary. Uncropped.

Reviewed September 26, 2026. Growing conditions vary by location.