How to Prune Epstein's barrenwort?
Cut back old foliage in late winter or early spring for the best display of new foliage and flowers

Epstein's barrenwort · Epimedium epsteinii
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