Erythrina caffra - African coral tree

Erythrina caffra, commonly known as the African Coral Tree, is a spectacular ornamental tree native to southern Africa. It is prized for its stunning orange-red flowering from spring to summer. With its broad, elegant silhouette, it adds a touch of exoticism to Mediterranean coastal gardens. Gardeners in colder regions can grow it in containers on a terrace or balcony, allowing it to be protected from winter cold in a temperate greenhouse or lightly heated conservatory.

Erythrina caffra belongs to the Fabaceae family and is a relative of the much more well-known Erythrina crista-galli. This botanical species originates from the coastal regions of southern Africa, particularly the Eastern Cape province and northern KwaZulu-Natal in South Africa. It is mainly found in coastal forests and along wooded rivers, stretching from the Humansdorp district to Port Shepstone, and inland up to about 57 km in the Albany district. Isolated populations also exist in the Hlabisa and Lake Sibayi areas of Zululand. The Erythrina caffra is a medium-sized deciduous tree, reaching 9 to 12 m in the ground in South Africa, with exceptional specimens growing up to 20 m under optimal conditions. In southern Europe, it typically reaches 4 to 6 m in height, with a spread of 3 to 5 m when planted in the ground. When grown in a pot, the plant usually does not exceed 2 to 3 m in height, with a proportionally smaller spread. The crown of this Coral Tree is both rounded and dense. The trunk and branches are grey, sometimes adorned with short, sharp thorns. The leaves are trifoliate, with each leaflet broadly ovate to elliptical, measuring between 8 and 16 cm in length and 8 to 18 cm in width. The terminal leaflet is usually larger than the lateral ones. In temperate European climates, this tree tends to lose its leaves in autumn and flowers in spring before the new foliage appears. This seasonal adaptation is influenced by local climatic variations. The spectacular flowers emerge before the foliage, between April and May, or in summer among the leaves, depending on the climate. They are grouped in large clusters at the ends of the branches and display a scarlet-orange hue with a terracotta tint. Each flower has a short, broad standard petal, curved upwards, exposing the stamens and giving the flower a shaggy appearance. The fruits are dark, cylindrical pods, about 6.5 cm long, which split open to release shiny coral-red seeds marked with a black spot on one side.

The root system of Erythrina caffra is relatively shallow, with spreading roots that can extend widely around the tree. This root configuration makes it susceptible to strong winds, especially in shallow soils. Growth is rapid under favourable conditions, in full sun and well-drained, moist soil. This species tolerates a wide range of soils, including well-drained damp soils and drier clay soils. A mature specimen can withstand temperatures as low as -4°C briefly. In areas with insufficient sunlight and cool temperatures, its flowering may be compromised. In favourable climates, you can plant this Coral Tree as a standalone specimen. It pairs beautifully with mimosas, eucalyptus, and palm trees.