Euphorbia suzannae - Euphorbia cactus

Euphorbia susannae, sometimes spelled E. suzannae, is a small succulent plant native to the Cape Province in South Africa. Notable for its originality and relatively fast growth, this spurge features fleshy green to brownish stems, devoid of thorns. It grows to form hemispherical cushions that can reach up to 10 cm in height and 30 cm in diameter. Its stems have between 12 and 16 ribs adorned with conical tubercles ending in a thread-like tip. During flowering, it produces small greenish or brownish cyathia.

Belonging to the Euphorbiaceae family, Euphorbia susannae is a fast-growing perennial. In its natural habitat, it often grows in dense clumps on rocky plains or in the shade of larger shrubs. The stems, typically measuring between 3 and 7 cm in diameter, are tuberculate and feature well-defined ribs. The leaves are reduced to short bristles on young shoots and fall off quickly. The flowers, called cyathia, usually appear in autumn or spring and are green or brownish. This species is dioecious, meaning male and female flowers are found on separate plants. After pollination, the female plant produces small purple or almost black capsules containing nearly spherical seeds.

To cultivate Euphorbia susannae indoors, place it in a spot with bright light, with direct morning or late afternoon sun, as it dislikes prolonged direct sunlight. Mature specimens can also be grown outdoors under the same conditions, provided frosts are brief and do not exceed -4°C. A well-draining substrate, such as a cactus mix, is essential to prevent root rot. Water moderately during the growing season (spring and summer), allowing the substrate to dry out completely between waterings, and reduce watering in autumn and winter. Handle with gloves, as its white sap is toxic and may cause skin irritation.

Euphorbia susannae pairs well with other compact succulents, such as Haworthia or Lithops, in a composition that plays with varied forms and textures. It can also be showcased alongside small Echeveria 'Perle Von Nürnberg'. Using decorative gravel or natural stones around the plant can enhance its appeal and evoke its native habitat.