How to Propagate Epimedium × setosum?
Propagate by division in autumn or after flowering; or by root cuttings of rhizomes, kept under glass in winter, and planted out after all danger of frost has passed

Epimedium × setosum · Epimedium × setosum
Grow in fertile, humus-rich, moist but well-drained soil in partial shade, with shelter from cold, drying winds. Where frosts are prolonged or severe, spread an organic mulch such as leaf mould or composted bark to protect plants over winter
Propagate by division in autumn or after flowering; or by root cuttings of rhizomes, kept under glass in winter, and planted out after all danger of frost has passed