Euphorbia trigona, African milk tree, cathedral cactus, or Abyssinian euphorbia, is a species of flowering plant that originates from Central Africa. Somewhat common in cultivation as a houseplant or as a hedge, the species is one of the euphorbias with succulent stems and branches as an adaptation to arid climates. This succulent shrub has an upright stem and many branches that also grow upward. The stem and branches can have two or three sides. The stem itself is dark green with V-shaped light green patterns. The 5 mm (1?4 in) thorns occur in pairs on the stem's ridges. The drop shaped leaves grow from between the two thorns on each ridge Euphorbia trigona can withstand brief cold temperatures of down to ?3 C (27 F). It prefers sandy soil but can cope with most types of well-drained soil. It can root easily from stem cuttings, if allowed to dry for 3?7 days before planting so that it can form a callus and not rot. It grows to a height of 1.5?3 m (4 ft 11 in ? 9 ft 10 in). Care: Soil: Loose, well-draining soil that is moderately fertile. Temperature: Can withstand temperatures down to frost (= 32 degrees) for a short period of time. Water: Occasional, deep watering. Allow the soil to completely dry out between waterings. ... Sun: Full sun in temperate regions