Crown of Thorns

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:

https://plants.ces.ncsu.edu/plants/euphorbia-milii/#:~:text=In%20its%20country%20of%20origin,drained%20soils%20in%20full%20sun.