How to Prune Persian epimedium?
Cut back old foliage in late winter or early spring for the best display of new foliage and flowers

Persian epimedium · Epimedium pinnatum
Also known as: large-flowered barrenwort
Grow in fertile, moist but well-drained, humus-rich soil in partial shade; shelter from cold, dry winds
Cut back old foliage in late winter or early spring for the best display of new foliage and flowers