Wulfen's spurge

Wulfen's spurge (Euphorbia characias subsp. wulfenii) is a distinct perennial plant belonging to the Euphorbiaceae family. It is widely recognized as a robust, evergreen subshrub that provides a strong architectural presence in a landscape, characterized by its upright, woody stems and striking, long-lasting floral displays.

Originating from the Mediterranean region, this plant thrives in warm, dry climates. Its natural habitat is typically rocky slopes and scrublands, which dictates its preference for well-drained conditions. In cultivation, it is favored in temperate regions that can provide winter protection from severe frost.

Botanically, the plant is noted for its tall, unbranched stems covered in narrow, glaucous-green leaves. The most significant feature is its massive, cylindrical inflorescence, composed of chartreuse-yellow flowers that appear in early spring and continue into early summer. The overall structure forms a dramatic, rounded mound.

Cultivation requirements focus on full sun exposure and poor to moderately fertile, well-draining soil. It is highly drought-tolerant once established and performs poorly in heavy, waterlogged ground, which significantly increases the risk of root rot. Maintenance involves pruning old flowered stems back to the base to encourage fresh growth.

• Requires full sun for optimal flowering
• Thrives in lean, gritty soil types
• Prune annually after flowering finishes
• Wear gloves when handling due to irritating milky sap

This species is primarily utilized for its aesthetic value in landscape design, specifically in Mediterranean-style gardens, dry borders, and gravel beds. While generally hardy, it can be susceptible to spider mites in very dry conditions or fungal crown rots if irrigation is excessive. The plant's sap is a defensive mechanism and must be handled with care to avoid skin irritation.