Euphorbia trigona f. rubra - African milk tree

Euphorbia trigona f. rubra, also known as the red cactus spurge or red-leaved African milk tree, is a magnificent plant specimen. Unlike the classic green form, its foliage is coloured in intense red to deep purple, depending on the light. Its sculptural habit and vibrant colours make it an extraordinary houseplant. Just as hardy as the green variety, it requires minimal maintenance, adapts to dry environments and thrives in bright light. In the living room, office or conservatory, it pairs perfectly with ceramic or concrete pots.

Euphorbia trigona f. rubra is a form of Euphorbia trigona distinguished by the red to purple pigmentation of its stems and leaves. This plant belongs to the Euphorbiaceae family. The original species is native to Central Africa, particularly regions of Gabon, Angola and Congo. In its natural habitat, it grows in warm, dry and sunny environments, which explains its drought tolerance and preference for bright light. This shrubby succulent plant develops upright, fleshy and branched stems with three or four ribs and prominent aristas. Small reddish-brown thorns, measuring 2 to 4 mm, grow in pairs along the aristas. Between these thorns are spatulate leaves, 3 to 5 cm long. These leaves can persist for a long time on the plant if temperature and watering conditions are adequate. Indoors, Euphorbia trigona f. rubra reaches a maximum height of around 1.8 m. Its spread depends on the space available for growth.
Indoors, Euphorbia trigona f. rubra prefers bright light exposure, even direct sunlight, to maintain the intensity of its purple colouration. It adapts well to dry atmospheres and tolerates typical household temperatures, between 15 and 24°C. Moderate watering is recommended, allowing the substrate to dry out between waterings to avoid excess moisture. A well-draining potting mix, such as a cactus blend, is ideal for this plant. Adding liquid fertiliser for succulent plants once a month during the growth period will encourage its development.

With its candelabra-like silhouette and rich colouring, the purple cactus spurge makes a striking statement in modern or minimalist interiors. It can be showcased in a bright living room, a well-lit office or a conservatory. White ceramic or concrete pots will highlight its unique aesthetic. You can place it near a variegated Ficus houseplant and a Schefflera arboricola. Avoid placing it in humid rooms like the bathroom, as it prefers a dry atmosphere.