Crown of Thorns
Euphorbia milii
Family: Euphorbiaceae
Significant varieties: Var. tananarivae/lutea - species
Native Range: Madagascar
Cultural Use/Significance: The common name refers to the legend that this plant was used for Christ’s crown of thorns. It had been introduced to the Middle East prior to this, but it is unknown what plant was truly used.
Cultural Requirements
Temperature: Above 35° F Above 35° F
Irrigation: Occasionally dry. Some hybrids require more water
Relative Humidity: Low
Fertilizer: Lightly in spring and summer. Sensitive to Boron.
Substrate: Well-drained soils
Light: Full sun. Provide midday shade in hotter areas.
Day Length: Darkness at night is required for flowering
References:
Crown of Thorns, Euphorbia milii