Euphorbia characias subsp. wulfenii, or simply Euphorbia wulfenii or Mediterranean Spurge is a medium-sized sub-shrub. It is considered a biennial by many since the flowering branches need to be cut back to the ground. In many cases, it blooms in the second year, and then it is cut. It is native to the Mediterranean. It is from the Euphorbiaceae family of plants. It has greyish-green leaves. The flowers are greenish-yellow. They are dome-shaped.
Grow it in the sun and moist but well-drained soil. Cut back in late summer or autumn. Euphorbia characias subsp. wulfenii is drought-resistant. Watch out for aphids. Otherwise, it is disease-free. You can propagate Euphorbia characias subsp. wulfenii from basal cuttings in early spring or division in early spring. For cuttings, in order to prevent bleeding deep cut in lukewarm water. Be careful handling the plant, the sap can irritate the skin.