Crown of Thorns

Frost Tolerance: Euphorbia millii does OK in Phoenix, some showier hybrids need frost protection

Heat Tolerance: Avoid full sun in Phoenix

Sun Exposure: Full sun to light shade (light shade better in Phoenix)

Origin: garden

Growth Habits: Woody perennial to 4 feet (1.2 m)

Watering Needs: Occasional water, regular watering in summer helps it retaining its leaves

Propagation: Stem cuttings

It blooms freely most of the year. It normally becomes dormant in summer… don't throw it away if it loses its leaves. As with the other Euphorbias, its sap is poisonous, it irritates the skin, and can cause temporary blindness if it goes in the eyes.

Propagation:
Trim the stems that are too long, let them dry a couple of day, and stick them into potting medium. They should grow easily if the temperature is hot enough.