How to Prune Warley epimedium?
Foliage is truly evergreen so no need to cut back

Warley epimedium · Epimedium × warleyense
Grow in fertile, moist but well-drained, humus-rich soil in partial shade; shelter from cold, dry winds. Can tolerate some sun if soil remains moist.
Foliage is truly evergreen so no need to cut back