Sophora affinis

Sophora affinis, commonly known as Eve's necklace, is a deciduous tree belonging to the Fabaceae family. It is a slow-growing species typically reaching moderate heights, characterized by its elegant, pinnate foliage and a structure that makes it an excellent candidate for specimen planting in residential and urban landscapes.

The species is native to the south-central United States, particularly within Texas, Arkansas, and Oklahoma. It naturally thrives in diverse habitats, ranging from river bottoms to rocky limestone hillsides. Its evolutionary background in these regions makes it highly adaptable to varying moisture levels once the root system is well-established.

Botanically, the tree is noted for its beautiful, drooping racemes of pink to light purple pea-like flowers. One of its most distinct features is the fruit: constricted, blackish pods that resemble a string of beads, which persist on the tree through the winter, providing unique visual interest long after the leaves have fallen.

Agricultural and gardening management requires careful site selection, as this species prefers full sun to light shade. It is remarkably drought-tolerant, although regular irrigation during the first year of establishment is crucial. Soil should be well-drained, as the tree does not tolerate waterlogging, which can lead to root rot and other fungal infections.

In terms of usage, Sophora affinis is highly valued for its ornamental appeal, nitrogen-fixing capabilities, and role as a nectar source for pollinators. It is frequently utilized in xeriscaping projects and native plant gardens. While generally resistant to major pests, growers should monitor for aphids and occasional scale insects to maintain optimal health.

• Excellent drought tolerance once established
• Striking decorative fruit in winter
• Fixes nitrogen, improving soil quality
• Supports local pollinator populations
• Thrives in alkaline and limestone soils