Euphorbia trigona - African milk tree

Euphorbia trigona, commonly known as the African milk tree, is a popular houseplant prized for its candelabra-like silhouette and easy care. Its small, teardrop-shaped leaves scattered along its succulent stems add a delicate touch to its robust appearance. This euphorbia thrives in bright light, tolerates a few hours of direct sunlight, and requires minimal watering. It makes a striking statement in a contemporary or minimalist living room or office.

Euphorbia trigona, sometimes nicknamed the African milk tree, belongs to the Euphorbiaceae family. It is also encountered under the botanical synonym Euphorbia hermentiana. This shrubby succulent plant features upright, fleshy, and branched stems, typically with three ribs (occasionally four) and prominent ridges. The dark green stems are adorned with lighter "V"-shaped patterns, giving them a marbled appearance. Small reddish-brown thorns, measuring 2 to 4 mm, grow in pairs along the ridges. Between these thorns are spatulate, 3 to 5 cm long leaves. These leaves may persist for a long time on the plant if temperature and watering conditions are suitable. Indoors, Euphorbia trigona typically reaches a maximum height of around 1.8 m. Its spread depends on the space available. Native to Central Africa, particularly from Gabon to Malawi, Euphorbia trigona is adapted to warm, dry to semi-arid environments. In its natural habitat, it thrives in areas with pronounced dry seasons, forming dense bushes.
Indoors, it is essential to place Euphorbia trigona in a spot with bright light, ideally with a few hours of direct sunlight. It tolerates a wide range of temperatures but prefers conditions between 15 and 24 °C. A well-draining substrate is essential to prevent root rot; a specialised cactus and succulent mix is recommended. Watering should be moderate: allow the soil to dry out completely between waterings, reducing frequency during winter. Average ambient humidity is sufficient, and misting is unnecessary.
Like many euphorbias, Euphorbia trigona produces a toxic milky sap. This sap can cause skin irritation and mucous membrane inflammation upon contact. It is therefore advisable to handle the plant with gloves and keep it away from children and pets. Euphorbia trigona is not hardy and cannot tolerate temperatures below 0 °C, so it must be grown indoors or in a heated greenhouse in temperate climates.

The African milk tree stands out as a centrepiece in modern or minimalist decor. Its sculptural habit pairs perfectly with terracotta or sleek ceramic pots placed on the floor to emphasise its height. Ideal for a bright living room, office, or conservatory, it thrives near a well-exposed window. Pair it with other cacti or succulent plants like Adenium and Baobabs. Avoid humid rooms like bathrooms, as its fleshy foliage prefers a dry, well-ventilated environment.