Cut back any dead, dried foliage and stems, using pruning shears, in late winter. Epimedium foliage tends to fade during the winter time. Prune severely, down to the ground if necessary. This should be accomplished before blossoms appear in mid to late spring. Cutting back foliage will expose the attractive, delicate flowers, which might otherwise be hidden by the leaves.
Remove torn or tattered leaves of evergreen types to encourage new growth in late winter or very early spring. This schedule ensures you will not harm springtime blossoms.
Control height and spread of ground cover specimens as desired, using pruners to cut back stems. If this is performed during spring or summer, you may harm new growing parts, so it is best accomplished when foliage is dying back in winter.
Cut through roots, using a sharp spade, to divide clumps for propagation. This can be accomplished after flowering. Replant in well-drained soil in a shady location.